CVE-2026-52777

YesWiki: Authenticated PHP Object Injection in BazarImportAction via unserialize

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.

Affected

YesWiki · yeswiki

CVSS v4.0 GITHUB

9.4 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v4.0 GitHub

9.4 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

EPSS

0.28% chance of exploitation in the next 30 days, 19th percentile

Published

2026-09-04

Updated

2026-09-08

Proof-of-concept exploits (1)

• advisories/GHSA-9369-69wj-7m2f

References

• CVE Record
• NVD entry