CVE-2025-46556 Details
Description
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.
A denial-of-service vulnerability has been identified in Mantis Bug Tracker (MantisBT) versions prior to 2.27.2. The issue arises from a lack of server-side validation on note length, allowing users to submit extremely long notes, tested with nearly 4.8 million characters. This excessive length can permanently corrupt issue activity logs by making the entire activity stream unviewable, as the user interface fails to render such long notes. Consequently, new notes cannot be displayed, disrupting future collaboration on the issue.
Users can update to MantisBT version 2.27.2 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Nov 6, 2025References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-770 | Allocation of Resources Without Limits or Throttling | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| mantisbt mantisbt | < 2.27.2 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Nov 7, 2025 | Initial Analysis | [email protected] |
| Nov 4, 2025 | New CVE Received | [email protected] |