{"id":"GHSA-fh48-f69w-7vmp","aliases":["CVE-2026-33517"],"title":"MantisBT Vulnerable to Stored HTML Injection in Tag Delete Confirmation","titleSource":"OSV","descriptionSource":"OSV","declaredSeverity":"HIGH","description":"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the issue.","severity":"high","score":8.6,"published":"2026-03-25T19:56:00.000Z","modified":"2026-03-25T20:26:19.897Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"mantisbt/mantisbt","sources":[{"name":"OSV · GHSA-fh48-f69w-7vmp","url":"https://osv.dev/vulnerability/GHSA-fh48-f69w-7vmp"}],"ranges":[{"events":[{"introduced":"2.28.0"},{"fixed":"2.28.1"}],"type":"ECOSYSTEM"}],"versions":["2.28.0"],"fixed":["2.28.1"]}],"sourceAffected":[],"references":["https://github.com/mantisbt/mantisbt/security/advisories/GHSA-fh48-f69w-7vmp","https://nvd.nist.gov/vuln/detail/CVE-2026-33517","https://github.com/mantisbt/mantisbt/commit/80990f43153167c73f11eb4b2bc7108d0c3d6b46","https://github.com/mantisbt/mantisbt/commit/d6890320752ecf37bd74d11fe14fe7dc12335be9","https://github.com/mantisbt/mantisbt","https://mantisbt.org/bugs/view.php?id=36971"],"sources":[{"name":"OSV","id":"GHSA-fh48-f69w-7vmp","modified":"2026-03-25T20:26:19.897008Z","url":"https://osv.dev/vulnerability/GHSA-fh48-f69w-7vmp"}],"assessments":[{"source":"OSV","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":8.6}],"products":[],"remediation":[],"kev":{"status":"not-listed","checkedAt":"2026-10-28T22:15:33.378Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}