CVE-2026-52777 PUBLISHED

YesWiki: Authenticated PHP Object Injection in BazarImportAction via unserialize

Assigner: GitHub_M
Reserved: 08.06.2026 Published: 04.09.2026 Updated: 04.09.2026

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.

Metrics

CVSS 4.0

CVSS Vector: 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
CVSS Score: 9.4

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	High
Attack Complexity	Low	Integrity	High	Integrity	High
Attack Requirements	None	Availability	High	Availability	High
Privileges Required	None
User Interaction	Active

CVSS 4.0

Product Status

Vendor	YesWiki
Product	yeswiki
Versions	Version < 4.6.6 is affected

References

Problem Types

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