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TI-2026-25939 Aliases CVE-2026-33548GHSA-73vx-49mv-v8w5

MantisBT has Stored HTML Injection / XSS when displaying Tags in Timeline

Priority LOW 39CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

Mantis Bug Tracker (MantisBT) is an open source issue tracker. In version 2.28.0, 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. Version 2.28.1 contains a patch. Workarounds include editing offending History entries (using SQL) and wrapping `$this->tag_name` in a string_html_specialchars() call in IssueTagTimelineEvent::html().

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00199 9th percentileScored 2026-11-07
Fix Fixed mantisbt/mantisbt (Packagist): 2.28.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
mantisbtmantisbt= 2.28.0—No fix listedCNA
—mantisbt/mantisbt (Packagist)2.28.0 to before 2.28.22.28.2Patch availableGHSA-73vx-49mv-v8w5
  • mantisbt Vendormantisbt Affected = 2.28.0 Fixed in — No fix listed CNA
  • mantisbt/mantisbt (Packagist) Vendor— Affected 2.28.0 to before 2.28.2 Fixed in 2.28.2 Patch available GHSA-73vx-49mv-v8w5

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mantisbt:mantisbt:2.28.0:*:*:*:*:*:*:*2.28.0Vulnerablemantisbt
  • cpe:2.3:a:mantisbt:mantisbt:2.28.0:*:*:*:*:*:*:* Versions 2.28.0 Vulnerable ·mantisbt

Remediation

  • Fix · GHSA-73vx-49mv-v8w5 mantisbt/mantisbt (Packagist) Fixed in 2.28.2 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-33548
  2. 2026-10-03 Alias added: GHSA-73vx-49mv-v8w5

References

Patch 2

Advisory 1

Other 2

  • TI-2017-05251 MantisBT through 2.3.0 allows arbitrary password reset and unauthenticated admin access… CVSS 3.1HIGH 8.8
  • TI-2014-05966 The XmlImportExport plugin in MantisBT 1.2.17 and earlier allows remote attackers to… CVSS 2.0HIGH 7.5
  • TI-2025-38760 MantisBT unauthorized disclosure of private project column configuration CVSS 4.0MEDIUM 5.3
  • TI-2017-04981 A cross-site scripting (XSS) vulnerability in the MantisBT Configuration Report page… CVSS 3.0MEDIUM 4.8
  • TI-2019-11797 MantisBT before 1.3.20 and 2.22.1 allows Post Authentication Command Injection, leading to Remote Code Execution. CVSS 3.1HIGH 7.2
  • TI-2014-07063 The XML Import/Export plugin in MantisBT 1.2.x does not restrict access, which allows… CVSS 2.0MEDIUM 6.4
See all 121 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences