270 lines
11 KiB
JSON
270 lines
11 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-39912",
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"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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"state": "PUBLISHED",
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"assignerShortName": "VulnCheck",
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"dateReserved": "2026-04-07T20:57:06.209Z",
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"datePublished": "2026-04-09T18:35:35.569Z",
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"dateUpdated": "2026-11-08T14:02:33.091Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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"shortName": "VulnCheck",
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"dateUpdated": "2026-11-08T14:02:33.091Z"
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},
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"title": "v2board / Xboard Authentication Token Exposure via loginWithMailLink",
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"descriptions": [
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{
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"lang": "en",
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"value": "V2Board 1.6.1 through 1.7.4 and Xboard through 0.1.9 expose authentication tokens in HTTP response bodies of the loginWithMailLink endpoint when the login_with_mail_link_enable feature is active. Unauthenticated attackers can POST to the loginWithMailLink endpoint with a known email address to receive the full authentication URL in the response, then exchange the token at the token2Login endpoint to obtain a valid bearer token with complete account access including admin privileges.",
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"supportingMedia": [
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{
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"type": "text/html",
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"base64": false,
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"value": "V2Board 1.6.1 through 1.7.4 and Xboard through 0.1.9 expose authentication tokens in HTTP response bodies of the loginWithMailLink endpoint when the login_with_mail_link_enable feature is active. Unauthenticated attackers can POST to the loginWithMailLink endpoint with a known email address to receive the full authentication URL in the response, then exchange the token at the token2Login endpoint to obtain a valid bearer token with complete account access including admin privileges.<br>"
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}
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]
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"cweId": "CWE-201",
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"description": "CWE-201 Insertion of Sensitive Information Into Sent Data",
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"type": "CWE"
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}
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]
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}
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],
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"affected": [
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{
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"vendor": "v2board",
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"product": "v2board",
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"repo": "https://github.com/v2board/v2board",
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"versions": [
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{
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"status": "affected",
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"version": "1.6.1",
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"lessThanOrEqual": "1.7.4",
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"versionType": "semver"
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},
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{
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"status": "affected",
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"version": "bdb10bed32c5f37df2f0872c3cb354e9b7a293bd",
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"lessThanOrEqual": "0ca47622a50116d0ddd7ffb316b157afb57d25e8",
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"versionType": "git"
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}
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],
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"defaultStatus": "unknown",
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"packageURL": "pkg:github/v2board/v2board"
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},
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{
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"vendor": "cedar2025",
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"product": "Xboard",
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"repo": "https://github.com/cedar2025/Xboard",
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"versions": [
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{
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"status": "affected",
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"version": "0",
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"lessThanOrEqual": "0.1.9",
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"versionType": "semver"
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},
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{
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"status": "unaffected",
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"version": "121511523f04882ec0c7447acd9b8ebcb8a47957",
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"versionType": "git"
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}
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],
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"defaultStatus": "unaffected",
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"packageURL": "pkg:github/cedar2025/Xboard"
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:a:v2board:v2board:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "1.6.1",
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"versionEndIncluding": "1.7.4"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:a:v2board:v2board:*:*:*:*:*:*:*:*"
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}
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]
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}
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]
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}
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],
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"metrics": [
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{
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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],
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"cvssV4_0": {
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"attackVector": "NETWORK",
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"attackComplexity": "LOW",
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"attackRequirements": "PRESENT",
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"privilegesRequired": "NONE",
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"userInteraction": "NONE",
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"vulnConfidentialityImpact": "HIGH",
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"subConfidentialityImpact": "NONE",
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"vulnIntegrityImpact": "HIGH",
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"subIntegrityImpact": "NONE",
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"vulnAvailabilityImpact": "NONE",
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"subAvailabilityImpact": "NONE",
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"Safety": "NOT_DEFINED",
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"Automatable": "NOT_DEFINED",
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"Recovery": "NOT_DEFINED",
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"valueDensity": "NOT_DEFINED",
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"vulnerabilityResponseEffort": "NOT_DEFINED",
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"providerUrgency": "NOT_DEFINED",
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"version": "4.0",
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"baseSeverity": "CRITICAL",
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"baseScore": 9.1,
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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
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}
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},
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{
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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],
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"cvssV3_1": {
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"version": "3.1",
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"attackVector": "NETWORK",
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"attackComplexity": "LOW",
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"privilegesRequired": "NONE",
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"userInteraction": "NONE",
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"scope": "UNCHANGED",
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"confidentialityImpact": "HIGH",
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"integrityImpact": "HIGH",
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"availabilityImpact": "NONE",
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"baseSeverity": "CRITICAL",
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"baseScore": 9.1,
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
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}
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}
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],
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"references": [
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{
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"url": "https://chocapikk.com/posts/2026/xboard-v2board-account-takeover/",
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"tags": [
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"technical-description",
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"exploit"
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]
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},
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{
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"url": "https://github.com/v2board/v2board/pull/981",
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"tags": [
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"issue-tracking",
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"patch"
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]
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},
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{
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"url": "https://github.com/cedar2025/Xboard/pull/873",
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"tags": [
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"issue-tracking",
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"patch"
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]
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},
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{
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"url": "https://github.com/v2board/v2board/blob/0ca47622a50116d0ddd7ffb316b157afb57d25e8/app/Http/Controllers/Passport/AuthController.php#L71",
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"tags": [
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"related"
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]
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},
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{
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"url": "https://github.com/cedar2025/Xboard/blob/1fe6531924cc1ec662a88b9ef725afcf78d660bc/app/Services/Auth/MailLinkService.php#L49",
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"tags": [
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"related"
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]
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},
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{
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"url": "https://github.com/cedar2025/Xboard/blob/1fe6531924cc1ec662a88b9ef725afcf78d660bc/app/Http/Controllers/V1/Passport/AuthController.php#L51",
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"tags": [
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"related"
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]
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},
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{
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"url": "https://github.com/cedar2025/Xboard/commit/121511523f04882ec0c7447acd9b8ebcb8a47957",
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"tags": [
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"patch"
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]
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},
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{
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"url": "https://www.vulncheck.com/advisories/v2board-xboard-authentication-token-exposure-via-loginwithmaillink",
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"tags": [
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"third-party-advisory"
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]
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}
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],
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"credits": [
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{
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"lang": "en",
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"value": "Valentin Lobstein (Chocapikk)",
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"type": "finder"
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}
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],
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"source": {
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"discovery": "EXTERNAL"
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},
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"x_generator": {
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"engine": "vulncheck"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-04-10T20:16:59.517212Z",
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"id": "CVE-2026-39912",
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"options": [
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{
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"Exploitation": "poc"
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},
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{
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"Automatable": "yes"
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},
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{
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"Technical Impact": "total"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-04-13T15:38:46.529Z"
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}
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}
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]
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}
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} |