MantisBT Vulnerable to Stored HTML Injection in Tag Delete Confirmation
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. ### Impact Cross-site scripting (XSS). ### Patches 80990f43153167c73f11eb4b2bc7108d0c3d6b46 ### Workarounds * Revert commit d6890320752ecf37bd74d11fe14fe7dc12335be9 * 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/` ### Credits MantisBT hanks Vishal Shukla for discovering and responsibly reporting the issue.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-33517US | medium6.1 | — | ||
Mantis Bug Tracker (MantisBT) is an open source issue tracker. In version 2.28.0, when deleting a Tag (tag_delete.php), improper escaping of its name when displaying the confirmati… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/mantisbt/mantisbtPACKAGE
- https://github.com/mantisbt/mantisbt/commit/80990f43153167c73f11eb4b2bc7108d0c3d6b46WEB
- https://github.com/mantisbt/mantisbt/commit/d6890320752ecf37bd74d11fe14fe7dc12335be9WEB
- https://github.com/mantisbt/mantisbt/security/advisories/GHSA-fh48-f69w-7vmpWEB
- https://mantisbt.org/bugs/view.php?id=36971WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-33517ADVISORY
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