{"id":"GHSA-f633-865q-2mhh","aliases":["CVE-2026-40607"],"title":"MantisBT is Vulnerable to Stored XSS in Saved-Filter Owner Column","titleSource":"OSV","descriptionSource":"OSV","declaredSeverity":"HIGH","description":"Incorrect escaping of a saved filter's owner allows an attacker to inject arbitrary HTML on systems where $g_show_user_realname = ON.\n\n### Impact\nCross-site scripting (XSS).\n\nNote that By default, only users with *Manager* access level or above can save their filters publicly\n\n### Patches\n- 44f490bcf20fd491c1b8f3fc9dd041d8c2a30010\n\n### Workarounds\n- Prevent display of users' real name (set `$g_ show_user_realname = OFF;` in configuration)\n- Restrict ability to store filters (set $`g_stored_query_create_threshold` / $`g_stored_query_create_shared_threshold` to `NOBODY` \n\n### Credits\nThanks to siunam (Tang Cheuk Hei) for discovering and responsibly reporting the issue.","severity":"high","score":7.5,"published":"2026-05-11T19:35:05.000Z","modified":"2026-09-10T03:51:05.361Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"mantisbt/mantisbt","sources":[{"name":"OSV · GHSA-f633-865q-2mhh","url":"https://osv.dev/vulnerability/GHSA-f633-865q-2mhh"}],"ranges":[{"events":[{"introduced":"2.1.0"},{"fixed":"2.28.2"}],"type":"ECOSYSTEM"}],"versions":["2.10.0","2.10.1","2.11.0","2.11.1","2.12.0","2.12.1","2.12.2","2.13.0","2.13.1","2.13.2","2.14.0","2.15.0","2.15.1","2.16.0","2.16.1","2.17.0","2.17.1","2.17.2","2.18.0","2.18.1","2.19.0","2.19.1","2.20.0","2.20.1","2.21.0","2.21.1","2.21.2","2.21.3","2.22.0","2.22.1","2.22.2","2.23.0","2.23.1","2.24.0","2.24.1","2.24.2","2.24.3","2.24.4","2.24.5","2.25.0","2.25.1","2.25.2","2.25.3","2.25.4","2.25.5","2.25.6","2.25.7","2.25.8","2.26.0","2.26.1","2.26.2","2.26.3","2.26.4","2.27.0","2.27.1","2.27.2","2.27.3","2.28.0","2.28.1","2.3.0","2.3.1","2.3.2","2.3.3","2.4.0","2.4.1","2.4.2","2.5.0","2.5.1","2.5.2","2.6.0","2.7.0","2.7.1","2.8.0","2.8.1","2.9.0","2.9.1"],"fixed":["2.28.2"]}],"sourceAffected":[],"references":["https://github.com/mantisbt/mantisbt/security/advisories/GHSA-f633-865q-2mhh","https://nvd.nist.gov/vuln/detail/CVE-2026-40607","https://github.com/mantisbt/mantisbt/commit/44f490bcf20fd491c1b8f3fc9dd041d8c2a30010","https://github.com/mantisbt/mantisbt","https://mantisbt.org/bugs/view.php?id=37015"],"sources":[{"name":"OSV","id":"GHSA-f633-865q-2mhh","modified":"2026-09-10T03:51:05.361497190Z","url":"https://osv.dev/vulnerability/GHSA-f633-865q-2mhh"}],"assessments":[{"source":"OSV","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N","score":7.5}],"products":[],"remediation":[],"kev":{"status":"not-listed","checkedAt":"2026-10-28T21:25:31.856Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}