CVE-2025-46556CWE-770denial-of-service

CVE-2025-46556

Medium · published November 4, 2025

CVSS v3.1

6.5

EPSS

Percentile

34.3

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS v3.1: 6.5 · MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0: Not supplied
EPSS: 0.00411 · 34.3th percentile
Weakness: CWE-770 · Allocation of Resources Without Limits or Throttling
Published: 2025-11-04T06:15Z

Affected products (1)

Product	Versions	Fixed in
mantisbt/mantisbt	< 2.27.2	2.27.2

References (4)

https://github.com/mantisbt/mantisbt/commit/c99a41272532ba49b5c8dccb7797afead9864234 · [email protected]https://github.com/mantisbt/mantisbt/commit/d5cec6bffb44d54bd412c186b9baa409b1aa4238 · [email protected]https://github.com/mantisbt/mantisbt/commit/e9119c68b4a0eaa0bbde3deb121e81f5f7157361 · [email protected]https://github.com/mantisbt/mantisbt/security/advisories/GHSA-r3jf-hm7q-qfw5 · [email protected]

EPSS history

Timeline

04 NOV 00:20Z
MantisBT is Vulnerable to Denial-of-Service (DoS) attack via Excessive Note Length
cvelistv5