{"id":"CVE-2026-33548","aliases":["GHSA-73vx-49mv-v8w5"],"url":"https://o3.security/vulnerability/CVE-2026-33548","summary":"MantisBT has Stored HTML Injection / XSS when displaying Tags in Timeline","details":"Improper escaping of tag names retrieved from History in Timeline (my_view_page.php) allows an attacker to inject HTML and, if CSP settings permit, achieve execution of arbitrary JavaScript, when displaying a tag that has been renamed or deleted.\n\n### Impact\nCross-site scripting (XSS).\n\n### Patches\nf32787c14d4518476fe7f05f992dbfe6eaccd815\n\n### Workarounds\n* Edit offending History entries (using SQL)\n* Wrap `$this->tag_name` in a string_html_specialchars() call in IssueTagTimelineEvent::html()\n\n### Credits\nMantisBT thanks Vishal Shukla for discovering and responsibly reporting the issue.","published":"2026-03-23T19:15:18.891Z","modified":"2026-08-12T03:51:16.417885918Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"mantisbt/mantisbt","fixedVersion":"2.28.2"}],"fix":{"url":"https://github.com/mantisbt/mantisbt/commit/f32787c14d4518476fe7f05f992dbfe6eaccd815","label":"mantisbt/mantisbt@f32787c"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33548.json"},{"type":"ADVISORY","url":"https://github.com/mantisbt/mantisbt/security/advisories/GHSA-73vx-49mv-v8w5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33548"},{"type":"FIX","url":"https://github.com/mantisbt/mantisbt/commit/f32787c14d4518476fe7f05f992dbfe6eaccd815"},{"type":"PACKAGE","url":"https://github.com/mantisbt/mantisbt"},{"type":"WEB","url":"https://mantisbt.org/bugs/view.php?id=36973"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:16.417885918Z"}}