150 lines
6.9 KiB
JSON
150 lines
6.9 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-2026-48788",
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"state": "PUBLISHED",
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"assignerShortName": "GitHub_M",
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"dateReserved": "2026-05-22T20:18:20.365Z",
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"datePublished": "2026-06-16T22:29:38.877Z",
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"dateUpdated": "2026-06-17T13:20:11.543Z"
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},
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"containers": {
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"cna": {
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"title": "Remark42: Cross-Site Scripting (XSS) on /api/v1/img via content-type spoofing",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-79",
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"lang": "en",
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"description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
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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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"descriptions": [
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{
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"cweId": "CWE-436",
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"lang": "en",
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"description": "CWE-436: Interpretation Conflict",
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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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"metrics": [
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{
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"cvssV3_0": {
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"attackComplexity": "LOW",
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"attackVector": "NETWORK",
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"availabilityImpact": "NONE",
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"baseScore": 8.2,
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"baseSeverity": "HIGH",
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"confidentialityImpact": "HIGH",
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"integrityImpact": "LOW",
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"privilegesRequired": "NONE",
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"scope": "CHANGED",
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"userInteraction": "REQUIRED",
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"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
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"version": "3.0"
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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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"name": "https://github.com/umputun/remark42/security/advisories/GHSA-4c8j-mgm4-qqvp",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/umputun/remark42/security/advisories/GHSA-4c8j-mgm4-qqvp"
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},
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{
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"name": "https://github.com/umputun/remark42/commit/78d6de6bce1e961f023969da3ec8a00dd80c9ae8",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/umputun/remark42/commit/78d6de6bce1e961f023969da3ec8a00dd80c9ae8"
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},
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{
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"name": "https://github.com/umputun/remark42/releases/tag/v1.16.0",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/umputun/remark42/releases/tag/v1.16.0"
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}
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],
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"affected": [
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{
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"vendor": "umputun",
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"product": "remark42",
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"versions": [
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{
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"version": ">= 1.6.0, < 1.16.0",
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"status": "affected"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"shortName": "GitHub_M",
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"dateUpdated": "2026-06-16T22:29:38.877Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "Remark42 is a self-hosted comment engine for blogs, articles, or any other place where readers can add comments. Versions 1.6.0 through 1.15.0 contain a Cross-Site Scripting (XSS) vulnerability exploitable through content-type spoofing. The Remark42 image proxy fetches an arbitrary remote URL and re-serves the response from Remark42's own origin. During the download phase, the proxy determines whether the resource is an image by inspecting only the Content-Type header advertised by the remote server, never examining the actual bytes; during the serving phase, it instead derives the response Content-Type by sniffing those bytes with http.DetectContentType. An attacker can exploit this inconsistency by hosting a URL that advertises Content-Type: image/png while returning an HTML/JavaScript body: the download check accepts it as an image, the serving path sniffs the body and emits Content-Type: text/html, and the browser renders the attacker-controlled HTML/JavaScript as a document within Remark42's origin. Exploitation requires no Remark42 account on the target instance; the attacker only needs to host the malicious upstream URL and deliver the proxy link to a victim by any means, such as email, direct message, or a link on another website. This issue has been fixed in version 1.16.0."
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}
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],
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"source": {
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"advisory": "GHSA-4c8j-mgm4-qqvp",
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"discovery": "UNKNOWN"
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}
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},
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"adp": [
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{
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"references": [
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{
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"url": "https://github.com/umputun/remark42/security/advisories/GHSA-4c8j-mgm4-qqvp",
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"tags": [
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"exploit"
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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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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-06-17T13:19:50.596883Z",
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"id": "CVE-2026-48788",
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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": "no"
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},
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{
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"Technical Impact": "partial"
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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": "2026-06-17T13:20:11.543Z"
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}
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}
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]
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}
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} |