{"id":"CVE-2026-63001","title":"REDAXO is a PHP-based content management system","summary":"REDAXO is a PHP-based content management system. Prior to 5.21.2, the mediaIsInUse() handler in redaxo/src/addons/media_manager/lib/media_manager.php inserts a Media Manager type name into raw backend warning HTML without escaping it whe…","severity":"medium","cvss":4.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","cwe":["CWE-79"],"vendor":"redaxo","product":"core","affected":["core < 5.21.2"],"patched":["redaxo/source 5.21.2"],"published":"2026-09-23","updated":"2026-09-23","sourceUpdated":"2026-09-23T20:17:12.363","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-63001","references":[{"url":"https://github.com/redaxo/core/commit/2daaa3a30570bc76a82f63fd21fb8c9c2cd5dc7c","label":"security-advisories@github.com"},{"url":"https://github.com/redaxo/core/pull/6581","label":"security-advisories@github.com"},{"url":"https://github.com/redaxo/core/releases/tag/5.21.2","label":"security-advisories@github.com"},{"url":"https://github.com/redaxo/core/security/advisories/GHSA-mf2p-wjp4-99pq","label":"security-advisories@github.com"},{"url":"https://github.com/advisories/GHSA-mf2p-wjp4-99pq"}],"tags":["nvd","cve.org","ghsa","composer"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-23T18:17:12.653764Z"},"aliases":["GHSA-mf2p-wjp4-99pq"],"ecosystem":"composer","ingestedAt":"2026-09-23T14:25:29.805Z","epss":0.00183,"epssPercentile":0.06972,"slug":"CVE-2026-63001","body":"## Overview\n\nREDAXO is a PHP-based content management system. Prior to 5.21.2, the mediaIsInUse() handler in redaxo/src/addons/media_manager/lib/media_manager.php inserts a Media Manager type name into raw backend warning HTML without escaping it when invoked through MEDIA_IS_IN_USE. An administrator with Media Manager access can store HTML in a type name, and the payload executes in another administrator's browser when that administrator tries to delete media referenced by the type's effects, enabling session theft or unauthorized backend actions. This issue is fixed in version 5.21.2.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-63001)\n\nAffected packages:\n\n- `redaxo/source <= 5.21.1`\n\nPatched in:\n\n- `redaxo/source 5.21.2`\n\nSource: https://github.com/advisories/GHSA-mf2p-wjp4-99pq","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":26.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}