Authentication Bypass Vulnerability in YesWiki Before Version 4.6.7
CVE-2026-104446

6.9MEDIUM

Key Information:

Vendor

Yeswiki

Status
Yeswiki
Vendor
CVE Published:
2 October 2026

What is CVE-2026-104446?

An authentication bypass vulnerability exists in YesWiki versions prior to 4.6.7 that allows unauthenticated attackers to exploit the contact mail AJAX handler. By sending a crafted XMLHttpRequest to the mail handler without required field or type parameters, attackers can relay arbitrary emails via the application's SMTP server. This issue presents a significant risk, enabling the potential for spam and phishing attacks.

Affected Version(s)

yeswiki 0 < 4.6.7

yeswiki 4.6.7

References

https://github.com/YesWiki/yeswiki/security/advisories/GH...
vendor-advisory
https://www.vulncheck.com/advisories/yeswiki-before-4.6.7...
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

manus-use
.