{"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": "2026-09-04T23:40:12.087Z"}, "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"}}}}

{}

{"affected": [{"affectedData": [{"product": "yeswiki", "vendor": "YesWiki", "versions": [{"status": "affected", "version": "< 4.6.6"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-52766", "lastModified": "2026-09-05T00:17:19.393", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-09-05T00:17:19.393", "references": [{"source": "security-advisories@github.com", "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"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-276"}, {"lang": "en", "value": "CWE-862"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.6.6)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "yeswiki", "source": "cna", "vendor": "YesWiki"}, "product": "yeswiki", "vendor": "yeswiki"}], "created": "2026-09-05T00:30:18.579537+00:00", "updated": "2026-09-05T01:45:17.352401+00:00", "vendors": ["yeswiki", "yeswiki$PRODUCT$yeswiki"]}