VULNERABILITY INTELLIGENCE

CVE-2025-46556

CVSS score6.5 MEDIUM
EPSS probability0.41%
CISA KEVNot currently listed
Published2025-11-04
Last modified2026-10-19
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

Weakness classification

  • security-advisories@github.com: CWE-770

Primary references