{"id":"CVE-2026-33517","aliases":["GHSA-fh48-f69w-7vmp"],"url":"https://o3.security/vulnerability/CVE-2026-33517","summary":"MantisBT Vulnerable to Stored HTML Injection in Tag Delete Confirmation","details":"Improper escaping of Tag name when deleting it in tag_delete.php allows an attacker to inject HTML and, if CSP settings permit, achieve execution of arbitrary JavaScript.\n\n### Impact\nCross-site scripting (XSS).\n\n### Patches\n80990f43153167c73f11eb4b2bc7108d0c3d6b46\n\n### Workarounds\n* Revert commit d6890320752ecf37bd74d11fe14fe7dc12335be9\n* Manually edit language files to remove the sprintf placeholder `%1$s` from *$s_tag_delete_message*  string, for example with `sed -r -i '/tag_delete_message/s/.%1\\$s.//' -- lang/`\n\n### Credits\nMantisBT hanks Vishal Shukla for discovering and responsibly reporting the issue.","published":"2026-03-23T19:13:15.220Z","modified":"2026-08-12T03:51:45.489421647Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"mantisbt/mantisbt","fixedVersion":"2.28.1"}],"fix":{"url":"https://github.com/mantisbt/mantisbt/commit/80990f43153167c73f11eb4b2bc7108d0c3d6b46","label":"mantisbt/mantisbt@80990f4"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33517.json"},{"type":"ADVISORY","url":"https://github.com/mantisbt/mantisbt/security/advisories/GHSA-fh48-f69w-7vmp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33517"},{"type":"FIX","url":"https://github.com/mantisbt/mantisbt/commit/80990f43153167c73f11eb4b2bc7108d0c3d6b46"},{"type":"FIX","url":"https://github.com/mantisbt/mantisbt/commit/d6890320752ecf37bd74d11fe14fe7dc12335be9"},{"type":"PACKAGE","url":"https://github.com/mantisbt/mantisbt"},{"type":"WEB","url":"https://mantisbt.org/bugs/view.php?id=36971"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:45.489421647Z"}}