CVE-2026-52771
Dashboard / Vulnerabilities / CVE-2026-52771
Summary: YesWiki: Second-Order SQL Injection in Page Delete API via Unescaped Page Tag (`ApiController::deletePage`)
Details: 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.
References: https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52771.json, https://github.com/YesWiki/yeswiki/security/advisories/GHSA-8f2v-2qhj-gfwg, https://nvd.nist.gov/vuln/detail/CVE-2026-52771, https://github.com/YesWiki/yeswiki/commit/23d3cc124613b9428ab963b31807c08879a9c631
Affected packages
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Type: GIT
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