CVE-2025-46556
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.
Vulnerability Summary
CVSS v3 Score
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS Score (Exploitation Probability)
This vulnerability has a 0.06% probability of being exploited in the next 30 days, ranking higher than 20% of all scored CVEs.
CWE Classification
Related Vulnerabilities
Same Weakness Type(CWE-770)
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Similar SeverityMEDIUM
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Microsoft Defender Denial of Service Vulnerability
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