{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52766","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-08T17:13:43.064Z","datePublished":"2026-09-04T23:40:12.087Z","dateUpdated":"2026-09-09T16:01:55.410Z"},"containers":{"cna":{"title":"YesWiki: Unauthenticated arbitrary page deletion via `{{erasespamedcomments}}` action","problemTypes":[{"descriptions":[{"cweId":"CWE-276","lang":"en","description":"CWE-276: Incorrect Default Permissions","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"CWE-862: Missing Authorization","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/YesWiki/yeswiki/security/advisories/GHSA-6x7x-gcmf-7r8x","tags":["x_refsource_CONFIRM"],"url":"https://github.com/YesWiki/yeswiki/security/advisories/GHSA-6x7x-gcmf-7r8x"},{"name":"https://github.com/YesWiki/yeswiki/commit/ed5b548a705c8091ba0282aaaba73ddda976abef","tags":["x_refsource_MISC"],"url":"https://github.com/YesWiki/yeswiki/commit/ed5b548a705c8091ba0282aaaba73ddda976abef"},{"name":"https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6","tags":["x_refsource_MISC"],"url":"https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6"}],"affected":[{"vendor":"YesWiki","product":"yeswiki","versions":[{"version":"< 4.6.6","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-04T23:40:12.087Z"},"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."}],"source":{"advisory":"GHSA-6x7x-gcmf-7r8x","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/YesWiki/yeswiki/security/advisories/GHSA-6x7x-gcmf-7r8x","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-09T16:01:45.498684Z","id":"CVE-2026-52766","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-09T16:01:55.410Z"}}]}}