{"id":"CVE-2026-44642","published":"2026-09-25T16:17:25.970","lastModified":"2026-09-25T17:17:08.577","description":"Piwigo is a full featured open source photo gallery application for the web. Prior to 16.4.0, check_upgrade_access_rights() in admin/include/functions_upgrade.php conditionally escapes the submitted username only when the removed get_magic_quotes_gpc function exists, so PHP 8 and later concatenate an unauthenticated username directly into the upgrade authentication SQL query. When database upgrades are pending, a crafted query result can satisfy the status and password checks, set PHPWG_IN_UPGRADE, and authorize upgrade execution without valid administrator credentials. This can cause unauthorized database integrity changes and service disruption. This vulnerability is fixed in 16.4.0.","cvssScore":8.1,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-89"],"vendors":[],"products":[],"references":[{"url":"https://github.com/Piwigo/Piwigo/commit/1ff9d04534feb5f8f3cc2d3613c0fe8b51a1c0ba","tags":[]},{"url":"https://github.com/Piwigo/Piwigo/commit/2cfa7a3d194c8b95edde43038d8f5be5a359e785","tags":[]},{"url":"https://github.com/Piwigo/Piwigo/releases/tag/16.4.0","tags":[]},{"url":"https://github.com/Piwigo/Piwigo/security/advisories/GHSA-6wj3-7fhw-gfpm","tags":[]},{"url":"https://github.com/Piwigo/Piwigo/security/advisories/GHSA-6wj3-7fhw-gfpm","tags":[]}],"exploitRefs":[{"url":"https://github.com/Piwigo/Piwigo/commit/1ff9d04534feb5f8f3cc2d3613c0fe8b51a1c0ba","tags":[]},{"url":"https://github.com/Piwigo/Piwigo/commit/2cfa7a3d194c8b95edde43038d8f5be5a359e785","tags":[]},{"url":"https://github.com/Piwigo/Piwigo/releases/tag/16.4.0","tags":[]},{"url":"https://github.com/Piwigo/Piwigo/security/advisories/GHSA-6wj3-7fhw-gfpm","tags":[]},{"url":"https://github.com/Piwigo/Piwigo/security/advisories/GHSA-6wj3-7fhw-gfpm","tags":[]}],"hasPoc":true,"ai":null}