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CVE-2026-33517

MantisBT Vulnerable to Stored HTML Injection in Tag Delete Confirmation

Published: Mar 23, 2026Updated: Mar 25, 2026 Sources: CVE List NVDCWE-79
NVD MITRE
6.1CVSSMEDIUM
EPSS Score
0.2%
Top 84.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Vector Breakdown

AV:NAC:LPR:NUI:RS:CC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-79

Affected Products

mantisbtmantisbt
On-premWeb App
Enterprise Software / itsm-monitoring
mantisbtoss-projectEnterprise Softwareaka mantis bt

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://github.com/mantisbt/mantisbt/commit/80990f43153167c73f11eb4b2bc7108d0c3d6b46
github.com
https://github.com/mantisbt/mantisbt/commit/d6890320752ecf37bd74d11fe14fe7dc12335be9
github.com
https://github.com/mantisbt/mantisbt/security/advisories/GHSA-fh48-f69w-7vmp
github.com

Timeline

Published
Mar 23, 2026
Last Updated
Mar 25, 2026

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