Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/Cotonti/Cotonti
- https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/comments/controllers/actio
- https://github.com/Cotonti/Cotonti/blob/1.0.0/system/cache.php
- https://github.com/Cotonti/Cotonti/issues/1894
- https://github.com/Cotonti/Cotonti/pull/1897
- https://www.vulncheck.com/advisories/cotonti-1.0.0-php-object-injection-via-comm
FAQ
What is CVE-2026-93872?
CVE-2026-93872 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 instant...
How severe is CVE-2026-93872?
CVE-2026-93872 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-93872?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.