Authenticated PHP Object Injection in YesWiki by YesWiki
CVE-2026-52777

9.4CRITICAL

Key Information:

Vendor

Yeswiki

Status
Yeswiki
Vendor
CVE Published:
4 September 2026

What is CVE-2026-52777?

YesWiki, a PHP-based wiki system, contains a vulnerability that allows authenticated users to exploit the BazarImportAction feature using the unserialize function. This vulnerability can lead to potential code execution or data manipulation. A patch has been applied in version 4.6.6, resolving this critical issue and enhancing the overall security of the application.

Affected Version(s)

yeswiki < 4.6.6

References

https://github.com/YesWiki/yeswiki/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/YesWiki/yeswiki/commit/8f70a8d6b8befa0...
x_refsource_MISC
https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6
x_refsource_MISC

CVSS V4

Score:
9.4
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.