Vulnerability in Canarymail Canary Mail
CVE-2025-65318
When using the attachment interaction functionality, Canary Mail 5.1.40 and below saves documents to a file system without a Mark-of-the-Web tag, which allows attackers to bypass the built-in file protection mechanisms of both Windows OS and third-party software.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.006 (44.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- canary.com (Broken Link)
- canarymail.com (Broken Link)
- drive.google.com/file/d/14wrTzvcLPfFsWmy-SAtDwwZKKPssBsx5/view (Exploit)
- github.com/nickvourd/RTI-Toolkit (Not Applicable)
- github.com/bbaboha/CVE-2025-65318-and-CVE-2025-65319 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-65318?
- CVE-2025-65318 is a critical-severity vulnerability in Canarymail Canary Mail, classified under Protection Mechanism Failure. CVSS score: 9.1/10. Published 2025-12-16.
- How severe is CVE-2025-65318?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2025-65318 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.