{"id":"CVE-2026-52771","state":"PUBLISHED","title":"YesWiki: Second-Order SQL Injection in Page Delete API via Unescaped Page Tag (`ApiController::deletePage`)","description":"YesWiki is a wiki system written in PHP. From version 4.2.0 to before version 4.6.6, ApiController::deletePage() interpolates a page tag retrieved from the database into a DELETE FROM …_links WHERE to_tag = '$tag' query without escaping. The page tag is attacker-controlled — the POST /api/pages/{tag} API accepts arbitrary URL-encoded values, including single quotes, and stores them. A low-privilege authenticated user can therefore create a page whose tag is a SQL fragment, make the page non-orphaned via the standard {{include page=\"…\"}} link mechanism, and then invoke the delete endpoint to execute arbitrary SQL inside the wiki database - including time-based blind data exfiltration from any table. This issue has been patched in version 4.6.6.","publishedAt":"2026-09-04T23:41:34.061Z","updatedAt":"2026-09-08T16:56:23.664Z","severity":{"score":8.3,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["YesWiki yeswiki"],"affected":[{"vendor":"YesWiki","product":"yeswiki","versions":[{"version":">= 4.2.0, < 4.6.6","status":"affected"}]}],"references":["https://github.com/YesWiki/yeswiki/security/advisories/GHSA-8f2v-2qhj-gfwg","https://github.com/YesWiki/yeswiki/commit/23d3cc124613b9428ab963b31807c08879a9c631","https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6"],"weaknesses":["CWE-89"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/52xxx/CVE-2026-52771.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52771","state":"PUBLISHED","datePublished":"2026-09-04T23:41:34.061Z","dateUpdated":"2026-09-08T16:56:23.664Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-08T17:13:43.064Z"},"containers":{"cna":{"title":"YesWiki: Second-Order SQL Injection in Page Delete API via Unescaped Page Tag (`ApiController::deletePage`)","descriptions":[{"lang":"en","value":"YesWiki is a wiki system written in PHP. From version 4.2.0 to before version 4.6.6, ApiController::deletePage() interpolates a page tag retrieved from the database into a DELETE FROM …_links WHERE to_tag = '$tag' query without escaping. The page tag is attacker-controlled — the POST /api/pages/{tag} API accepts arbitrary URL-encoded values, including single quotes, and stores them. A low-privilege authenticated user can therefore create a page whose tag is a SQL fragment, make the page non-orphaned via the standard {{include page=\"…\"}} link mechanism, and then invoke the delete endpoint to execute arbitrary SQL inside the wiki database - including time-based blind data exfiltration from any table. This issue has been patched in version 4.6.6."}],"affected":[{"vendor":"YesWiki","product":"yeswiki","versions":[{"version":">= 4.2.0, < 4.6.6","status":"affected"}]}],"references":[{"url":"https://github.com/YesWiki/yeswiki/security/advisories/GHSA-8f2v-2qhj-gfwg","name":"https://github.com/YesWiki/yeswiki/security/advisories/GHSA-8f2v-2qhj-gfwg","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/YesWiki/yeswiki/commit/23d3cc124613b9428ab963b31807c08879a9c631","name":"https://github.com/YesWiki/yeswiki/commit/23d3cc124613b9428ab963b31807c08879a9c631","tags":["x_refsource_MISC"]},{"url":"https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6","name":"https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":8.3,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-89","lang":"en","description":"CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-04T23:41:34.061Z"},"source":{"advisory":"GHSA-8f2v-2qhj-gfwg","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-08T16:41:16.858942Z","id":"CVE-2026-52771","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-08T16:56:23.664Z"}}]}}}