Vulnerability Description
Stalwart is a mail and collaboration server. Versions 0.13.3 and below contain an unbounded memory allocation vulnerability in the IMAP protocol parser which allows remote attackers to exhaust server memory, potentially triggering the system's out-of-memory (OOM) killer and causing a denial of service. The CommandParser implementation enforces size limits on its dynamic buffer in most parsing states, but several state handlers omit these validation checks. This issue is fixed in version 0.13.4. A workaround for this issue is to implement rate limiting and connection monitoring at the network level, however this does not provide complete protection.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/stalwartlabs/stalwart/commit/a8e631e881bded8128358732f18e02ca
- https://github.com/stalwartlabs/stalwart/releases/tag/v0.13.4
- https://github.com/stalwartlabs/stalwart/security/advisories/GHSA-8jqj-qj5p-v5rr
FAQ
What is CVE-2025-61600?
CVE-2025-61600 is a vulnerability with a CVSS score of 7.5 (HIGH). Stalwart is a mail and collaboration server. Versions 0.13.3 and below contain an unbounded memory allocation vulnerability in the IMAP protocol parser which allows remote attackers to exhaust server ...
How severe is CVE-2025-61600?
CVE-2025-61600 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-61600?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.