Is CVE-2026-93872 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-93872?

CVE-2026-93872 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-93872

Description

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.