← Vulnerability feed

Vulnerability record · CVE-2025-46556 · published 4 November 2025

CVE-2025-46556: Mantisbt allocation without limits vulnerability

Mantisbt · Mantisbt

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.

7.5 CVSS 3.1 High EPSS 0.38% · top 70.2% CWE-770 · Allocation without limits
7.5CVSS 3.1 base score
0.38%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

Track CVE-2025-46556 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.6CVE-2019-15074Mantisbt cross-site scripting vulnerabilityThe Timeline feature in my_view_page.php in MantisBT through 2.21.1 has a stored cross-site scripting (XSS) vulnerability, allowing execution of arbi…EPSS 2.1%9.3CVE-2026-30849Mantisbt vulnerabilityMantis Bug Tracker (MantisBT) is an open source issue tracker. Versions prior to 2.28.1 running on MySQL family databases are affected by an authenti…EPSS 2.4%8.8CVE-2025-47776Mantisbt vulnerabilityMantis Bug Tracker (MantisBT) is an open source issue tracker. Due to incorrect use of loose (==) instead of strict (===) comparison in the authentic…EPSS 0.32%8.8CVE-2017-7615MantisBT weak password reset allows unauthenticated admin accessMantisBT through 2.3.0 mishandles password reset confirmation, allowing an attacker to supply an empty confirm_hash value to verify.php. This permits…EPSS 91%analysed8.6CVE-2026-33517Mantisbt cross-site scripting vulnerabilityMantis Bug Tracker (MantisBT) is an open source issue tracker. In version 2.28.0, when deleting a Tag (tag_delete.php), improper escaping of its name…EPSS 0.35%8.6CVE-2026-33548Mantisbt cross-site scripting vulnerabilityMantis Bug Tracker (MantisBT) is an open source issue tracker. In version 2.28.0, improper escaping of tag names retrieved from History in Timeline (…EPSS 0.29%8.3CVE-2024-23830Mantisbt injection vulnerabilityMantisBT is an open source issue tracker. Prior to version 2.26.1, an unauthenticated attacker who knows a user's email address and username can hija…EPSS 0.96%8.1CVE-2009-20001Mantisbt insufficient session expiration vulnerabilityAn issue was discovered in MantisBT before 2.24.5. It associates a unique cookie string with each user. This string is not reset upon logout (i.e., t…EPSS 0.87%

Source: NIST National Vulnerability Database (record CVE-2025-46556), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.