CVE-2026-52766

{"id": "CVE-2026-52766", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-52766", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-09T16:01:45.498684Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 5.2, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "YesWiki", "product": "yeswiki", "versions": [{"status": "affected", "version": "< 4.6.6"}]}]}], "published": "2026-09-05T00:17:19.393", "references": [{"url": "https://github.com/YesWiki/yeswiki/commit/ed5b548a705c8091ba0282aaaba73ddda976abef", "source": "security-advisories@github.com"}, {"url": "https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6", "source": "security-advisories@github.com"}, {"url": "https://github.com/YesWiki/yeswiki/security/advisories/GHSA-6x7x-gcmf-7r8x", "source": "security-advisories@github.com"}, {"url": "https://github.com/YesWiki/yeswiki/security/advisories/GHSA-6x7x-gcmf-7r8x", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-276"}, {"lang": "en", "value": "CWE-862"}]}], "descriptions": [{"lang": "en", "value": "YesWiki is a wiki system written in PHP. Prior to version 4.6.6, the {{erasespamedcomments}} wiki action (actions/EraseSpamedCommentsAction.php) accepts a suppr[] array from POST and deletes every wiki page whose tag appears in that array, with no authorization check anywhere in the action body or in the page-deletion path it invokes. Combined with YesWiki's allow-by-default action ACL model, any user who has page write access, which is the default for everyone (default_write_acl='*') on a fresh install can permanently delete arbitrary wiki pages, including the front page, admin pages, and pages owned by other users. This issue has been patched in version 4.6.6."}], "lastModified": "2026-09-09T17:17:22.047", "sourceIdentifier": "security-advisories@github.com"}