User Enumeration Vulnerability in YesWiki Affects Multiple Versions
CVE-2026-104439

7.1HIGH

Key Information:

Vendor

Yeswiki

Status
Yeswiki
Vendor
CVE Published:
2 October 2026

What is CVE-2026-104439?

A vulnerability in the LostPasswordAction.php file of YesWiki versions prior to 4.6.7 allows attackers to exploit user enumeration. Unauthenticated users can submit email addresses through the password recovery page and receive different responses, thereby confirming which accounts are valid. This lack of rate limiting enables attackers to enumerate registered email addresses, facilitating targeted phishing attempts and password spraying attacks. It is critical for users of YesWiki to upgrade to the latest version to mitigate this risk.

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:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

skeletonsec
.