CVE-2026-87920

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-87920", "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "state": "PUBLISHED", "assignerShortName": "Wordfence", "dateReserved": "2026-09-09T16:02:41.405Z", "datePublished": "2026-10-02T09:25:56.153Z", "dateUpdated": "2026-10-03T15:42:48.195Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "shortName": "Wordfence", "dateUpdated": "2026-10-02T09:25:56.153Z"}, "affected": [{"vendor": "boldgrid", "product": "W3 Total Cache", "versions": [{"version": "0", "status": "affected", "lessThanOrEqual": "2.10.6", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "The W3 Total Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content via Output-Buffer Regex Rewrite in all versions up to, and including, 2.10.6 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This vulnerability is only exploitable when the 'Remove query strings from static resources' option is enabled in W3 Total Cache, as mutate_url() must strip the '?' delimiter and everything following it \u2014 including the closing quote of the outer attribute \u2014 to break the attribute boundary."}], "title": "W3 Total Cache <= 2.10.6 - Unauthenticated Stored Cross-Site Scripting via Comment Content", "references": [{"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/34bd7c32-f4c5-4015-909a-e4730f35494b?source=cve"}, {"url": "https://plugins.trac.wordpress.org/browser/w3-total-cache/tags/2.10.6/BrowserCache_Plugin.php#L259"}, {"url": "https://plugins.trac.wordpress.org/browser/w3-total-cache/tags/2.10.6/BrowserCache_Plugin.php#L208"}, {"url": "https://plugins.trac.wordpress.org/browser/w3-total-cache/tags/2.10.6/BrowserCache_Plugin.php#L336"}, {"url": "https://plugins.trac.wordpress.org/changeset?reponame=&new=3723494%40w3-total-cache%2Ftags%2F2.10.7&old=3681561%40w3-total-cache%2Ftags%2F2.10.6"}, {"url": "https://plugins.trac.wordpress.org/changeset/3723494/w3-total-cache/trunk/BrowserCache_Plugin.php"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "cweId": "CWE-79", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N", "baseScore": 7.2, "baseSeverity": "HIGH"}}], "credits": [{"lang": "en", "type": "finder", "value": "theviper17y"}], "timeline": [{"time": "2026-09-09T16:17:54.000Z", "lang": "en", "value": "Vendor Notified"}, {"time": "2026-10-01T21:12:37.000Z", "lang": "en", "value": "Disclosed"}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-87920", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-03T15:28:36.836816Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-03T15:42:48.195Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-87920", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-03T15:28:36.836816Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-03T15:39:58.821Z"}}], "cna": {"title": "W3 Total Cache <= 2.10.6 - Unauthenticated Stored Cross-Site Scripting via Comment Content", "credits": [{"lang": "en", "type": "finder", "value": "theviper17y"}], "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.2, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N"}}], "affected": [{"vendor": "boldgrid", "product": "W3 Total Cache", "versions": [{"status": "affected", "version": "0", "versionType": "semver", "lessThanOrEqual": "2.10.6"}], "defaultStatus": "unaffected"}], "timeline": [{"lang": "en", "time": "2026-09-09T16:17:54.000Z", "value": "Vendor Notified"}, {"lang": "en", "time": "2026-10-01T21:12:37.000Z", "value": "Disclosed"}], "references": [{"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/34bd7c32-f4c5-4015-909a-e4730f35494b?source=cve"}, {"url": "https://plugins.trac.wordpress.org/browser/w3-total-cache/tags/2.10.6/BrowserCache_Plugin.php#L259"}, {"url": "https://plugins.trac.wordpress.org/browser/w3-total-cache/tags/2.10.6/BrowserCache_Plugin.php#L208"}, {"url": "https://plugins.trac.wordpress.org/browser/w3-total-cache/tags/2.10.6/BrowserCache_Plugin.php#L336"}, {"url": "https://plugins.trac.wordpress.org/changeset?reponame=&new=3723494%40w3-total-cache%2Ftags%2F2.10.7&old=3681561%40w3-total-cache%2Ftags%2F2.10.6"}, {"url": "https://plugins.trac.wordpress.org/changeset/3723494/w3-total-cache/trunk/BrowserCache_Plugin.php"}], "descriptions": [{"lang": "en", "value": "The W3 Total Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content via Output-Buffer Regex Rewrite in all versions up to, and including, 2.10.6 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This vulnerability is only exploitable when the 'Remove query strings from static resources' option is enabled in W3 Total Cache, as mutate_url() must strip the '?' delimiter and everything following it \u2014 including the closing quote of the outer attribute \u2014 to break the attribute boundary."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-79", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}]}], "providerMetadata": {"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "shortName": "Wordfence", "dateUpdated": "2026-10-02T09:25:56.153Z"}}}, "cveMetadata": {"cveId": "CVE-2026-87920", "state": "PUBLISHED", "dateUpdated": "2026-10-03T15:42:48.195Z", "dateReserved": "2026-09-09T16:02:41.405Z", "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "datePublished": "2026-10-02T09:25:56.153Z", "assignerShortName": "Wordfence"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "W3 Total Cache", "vendor": "boldgrid", "versions": [{"lessThanOrEqual": "2.10.6", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "security@wordfence.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The W3 Total Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content via Output-Buffer Regex Rewrite in all versions up to, and including, 2.10.6 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This vulnerability is only exploitable when the 'Remove query strings from static resources' option is enabled in W3 Total Cache, as mutate_url() must strip the '?' delimiter and everything following it \u2014 including the closing quote of the outer attribute \u2014 to break the attribute boundary."}], "id": "CVE-2026-87920", "lastModified": "2026-10-03T16:16:40.167", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.2, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 2.7, "source": "security@wordfence.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-87920", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-03T15:28:36.836816Z", "version": "2.0.3"}}]}, "published": "2026-10-02T10:17:08.857", "references": [{"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/w3-total-cache/tags/2.10.6/BrowserCache_Plugin.php#L208"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/w3-total-cache/tags/2.10.6/BrowserCache_Plugin.php#L259"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/w3-total-cache/tags/2.10.6/BrowserCache_Plugin.php#L336"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/changeset/3723494/w3-total-cache/trunk/BrowserCache_Plugin.php"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/changeset?reponame=&new=3723494%40w3-total-cache%2Ftags%2F2.10.7&old=3681561%40w3-total-cache%2Ftags%2F2.10.6"}, {"source": "security@wordfence.com", "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/34bd7c32-f4c5-4015-909a-e4730f35494b?source=cve"}], "sourceIdentifier": "security@wordfence.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security@wordfence.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,2.10.6]"}}], "enrichment": {"confidence": 90.0, "confidence_source": "inferred", "scores": [{"score": 90.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "W3 Total Cache", "source": "cna", "vendor": "boldgrid"}, "product": "w3_total_cache", "vendor": "boldgrid"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,2.10.6]"}}], "enrichment": {"confidence": 90.0, "confidence_source": "inferred", "scores": [{"score": 90.0, "source": "inferred"}]}, "product": "w3_total_cache", "vendor": "wordpress-extensions"}], "created": "2026-10-02T10:30:07.533566+00:00", "updated": "2026-10-02T14:45:14.320182+00:00", "vendors": ["boldgrid", "boldgrid$PRODUCT$w3_total_cache", "wordpress-extensions", "wordpress-extensions$PRODUCT$w3_total_cache"]}