CVE-2025-46556mediumCWE-770

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

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.5epss 0.4%

exploitation probability

0.4%top 69% of all CVEs

observed exploitation

nono source reports it

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

mantisbt · mantisbt

References

https://github.com/mantisbt/mantisbt/commit/c99a41272532ba49b5c8dccb7797afead9864234 https://github.com/mantisbt/mantisbt/commit/d5cec6bffb44d54bd412c186b9baa409b1aa4238 https://github.com/mantisbt/mantisbt/commit/e9119c68b4a0eaa0bbde3deb121e81f5f7157361 https://github.com/mantisbt/mantisbt/security/advisories/GHSA-r3jf-hm7q-qfw5