CVE-2026-52777

YesWiki: Authenticated PHP Object Injection in BazarImportAction via unserialize

State: Published
Severity: 9.4 Critical
Published: Sep 4, 2026
Updated: Sep 8, 2026
Reserved: Jun 8, 2026

Description

YesWiki is a wiki system written in PHP. Prior to version 4.6.6, there is an authenticated PHP object injection vulnerability in BazarImportAction via unserialize. This issue has been patched in version 4.6.6.

Scores

CVSS	Score	Vector	Source
4.0	9.4 Critical	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H	GitHub_M

Weaknesses

CWE-352 Cross-Site Request Forgery (CSRF)
CWE-502 Deserialization of Untrusted Data

Affected Products

Product	Versions
yeswikiYesWiki	< 4.6.6Affected

References

https://github.com/YesWiki/yeswiki/security/advisories/GHSA-9369-69wj-7m2f
https://github.com/YesWiki/yeswiki/commit/8f70a8d6b8befa0e644d03c785701dbbc55b8fd0
https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6

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