CVE-2026-52771

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{"affected": [{"affectedData": [{"product": "yeswiki", "vendor": "YesWiki", "versions": [{"status": "affected", "version": ">= 4.2.0, < 4.6.6"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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 \u2026_links WHERE to_tag = '$tag' query without escaping. The page tag is attacker-controlled \u2014 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=\"\u2026\"}} 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."}], "id": "CVE-2026-52771", "lastModified": "2026-09-08T21:05:26.920", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.8, "impactScore": 5.5, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-52771", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-08T16:41:16.858942Z", "version": "2.0.3"}}]}, "published": "2026-09-05T00:17:19.963", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/YesWiki/yeswiki/commit/23d3cc124613b9428ab963b31807c08879a9c631"}, {"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-8f2v-2qhj-gfwg"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-89"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.2.0,4.6.6)"}}], "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": "2026-09-05T03:00:07.356562+00:00", "updated": "2026-09-05T03:00:07.356604+00:00", "vendors": ["yeswiki", "yeswiki$PRODUCT$yeswiki"]}