CVE-2026-33517 — MEDIUM (6.1)

Vulnerability Description

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 confirmation message allows an attacker to inject HTML and, if CSP settings permit, achieve execution of arbitrary JavaScript. Version 2.28.1 fixes the issue. Workarounds include reverting commit d6890320752ecf37bd74d11fe14fe7dc12335be9 and/or manually editing language files to remove the sprintf placeholder `%1$s` from `$s_tag_delete_message` string.

CVSS Score

6.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Mantisbt	Mantisbt	2.28.0

Related Weaknesses (CWE)

CWE-79

References

https://github.com/mantisbt/mantisbt/commit/80990f43153167c73f11eb4b2bc7108d0c3dPatch
https://github.com/mantisbt/mantisbt/commit/d6890320752ecf37bd74d11fe14fe7dc1233Patch
https://github.com/mantisbt/mantisbt/security/advisories/GHSA-fh48-f69w-7vmpPatchVendor AdvisoryMitigation

FAQ

What is CVE-2026-33517?

CVE-2026-33517 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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 confirmation message allows an...

How severe is CVE-2026-33517?

CVE-2026-33517 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-33517?

Check the references section above for vendor advisories and patch information. Affected products include: Mantisbt Mantisbt.