CVE-2026-93872

Cotonti 1.0.0 passes the base64-decoded cb parameter to unserialize() without allowed_classes restriction in the comments plugin EditAction. Registered users with comment write permissions can instantiate arbitrary PHP objects and potentially achieve file write or code execution through gadget chains.

  • Published Sep 18, 2026
  • CVSS 7.7 high
  • 0.7% chance of exploitation in the next 30 days (EPSS)

Affected software

CVE-2026-93872 at the National Vulnerability Database