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TI-2025-29273 Aliases CVE-2025-46556GHSA-r3jf-hm7q-qfw5

MantisBT is Vulnerable to Denial-of-Service (DoS) attack via Excessive Note Length

Priority LOW 33CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-770.

Summary

Mantis Bug Tracker (MantisBT) is an open source issue tracker. Versions 2.27.1 and below allow attackers to permanently corrupt issue activity logs by submitting extremely long notes (tested with 4,788,761 characters) due to a lack of server-side validation of note length. Once such a note is added, the activity stream UI fails to render; therefore, new notes cannot be displayed, effectively breaking all future collaboration on the issue. This issue is fixed in version 2.27.2.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00411 35th percentileScored 2026-11-07
Fix Fixed mantisbt (mantisbt): 2.27.2mantisbt/mantisbt (Packagist): 2.27.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
mantisbtmantisbtbefore 2.27.22.27.2Patch availableCNA
—mantisbt/mantisbt (Packagist)before 2.27.22.27.2Patch availableGHSA-r3jf-hm7q-qfw5
  • mantisbt Vendormantisbt Affected before 2.27.2 Fixed in 2.27.2 Patch available CNA
  • mantisbt/mantisbt (Packagist) Vendor— Affected before 2.27.2 Fixed in 2.27.2 Patch available GHSA-r3jf-hm7q-qfw5

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mantisbt:mantisbt:*:*:*:*:*:*:*:*before 2.27.2Vulnerablemantisbt
  • cpe:2.3:a:mantisbt:mantisbt:*:*:*:*:*:*:*:* Versions before 2.27.2 Vulnerable ·mantisbt

Remediation

  • Fix · CNA mantisbt (mantisbt) Fixed in 2.27.2
  • Fix · GHSA-r3jf-hm7q-qfw5 mantisbt/mantisbt (Packagist) Fixed in 2.27.2 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-46556
  2. 2026-10-03 Alias added: GHSA-r3jf-hm7q-qfw5

References

Patch 3

Advisory 2

Other 1

  • 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