130 lines
6.1 KiB
JSON
130 lines
6.1 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-2026-76877",
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"assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
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"state": "PUBLISHED",
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"assignerShortName": "Wordfence",
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"dateReserved": "2026-08-19T22:01:11.520Z",
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"datePublished": "2026-11-10T06:47:00.496Z",
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"dateUpdated": "2026-11-13T14:59:23.969Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
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"shortName": "Wordfence",
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"dateUpdated": "2026-11-11T14:52:59.092Z"
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},
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"affected": [
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{
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"vendor": "WPML",
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"product": "WPML Multilingual CMS",
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"versions": [
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{
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"version": "0",
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"status": "affected",
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"lessThanOrEqual": "4.9.7",
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"versionType": "semver"
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}
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],
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"defaultStatus": "unaffected"
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}
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],
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"descriptions": [
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{
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"lang": "en",
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"value": "The WPML Multilingual CMS plugin for WordPress is vulnerable to Authentication Bypass via Race Condition in versions up to, and including, 4.9.7. This is due to the `process_iframe_request` function's language-per-domain SSO handler generating the cross-domain sign-in token via `wp_create_nonce('wpml_sso')` on the logout landing page, where the browser has already discarded its authentication cookies — so `wp_get_session_token()` returns an empty string and the token collapses to the shared anonymous nonce for the current 12-hour tick rather than a user-bound secret — and then storing it in the `wpml_sso_user_<token>_<sha256('wpml_sso'.$domain)>` transient mapped to the victim's `user_id` with no binding to the specific sign-out action or requesting client. Because an unauthenticated attacker can independently derive the identical token by triggering the logout confirmation flow on `wp-login.php?action=logout`, and because the `is_iframe_request()` gate conditions (the per-domain SSO `started` transient and domain-hash derived from the public constant `SSO_NONCE`) are fully computable within the 60-second `SSO_TIMEOUT` window, an unauthenticated attacker can submit the forged `wpml_sso_token_domain` parameter with a `wpml_user_signed_in` status to a secondary language-domain endpoint before the legitimate `wpml_user_signed_out` iframe fires, causing WordPress authentication cookies to be issued for the victim. This makes it possible for unauthenticated attackers to gain access to accounts of users — including administrators — who are actively in the process of logging out during the race window."
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}
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],
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"title": "WPML Multilingual CMS <= 4.9.7 - Unauthenticated Authentication Bypass in Language-per-Domain SSO via 'wpml_sso_token_domain' Parameter",
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"references": [
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{
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"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/006d1fcd-77b4-4214-be71-b6d71afad072?source=cve"
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},
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{
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"url": "https://wpml.org/"
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},
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{
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"url": "https://wpml.org/version/wpml-5-0-0/"
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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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"description": "CWE-287 Improper Authentication",
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"cweId": "CWE-287",
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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_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.1,
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"baseSeverity": "HIGH"
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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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"type": "finder",
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"value": "Yuto Hyakumoto"
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}
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],
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"timeline": [
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{
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"time": "2026-08-19T22:33:04.000Z",
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"lang": "en",
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"value": "Vendor Notified"
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},
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{
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"time": "2026-11-09T18:29:57.000Z",
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"lang": "en",
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"value": "Disclosed"
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}
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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": "2026-11-13T14:58:15.838219Z",
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"id": "CVE-2026-76877",
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"options": [
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{
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"Exploitation": "none"
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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": "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": "2026-11-13T14:59:23.969Z"
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}
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}
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]
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}
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} |