CVE-2026-104446
YesWiki before 4.6.7 Unauthenticated Open Mail Relay via Contact Mail Handler
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
YesWiki before 4.6.7 contains an authentication bypass in the contact mail AJAX handler that allows unauthenticated attackers to send email through the wiki's SMTP server. Attackers can POST an XMLHttpRequest to the mail handler without field or type parameters, supplying arbitrary recipient, sender, subject and body for spam and phishing.
| CWE | CWE-306 |
| Vendor | yeswiki |
| Product | yeswiki |
| Published | Oct 2, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low
Affected Versions
YesWiki / yeswiki
0 < 4.6.7
References
Credits
🔍 manus-use