High severity7.5NVD Advisory· Published Sep 18, 2026· Updated Sep 22, 2026
CVE-2026-93872
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.
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Affected products
1Patches
Vulnerability mechanics
References
5- github.com/Cotonti/Cotonti/blob/1.0.0/plugins/comments/controllers/actions/EditAction.phpnvd
- github.com/Cotonti/Cotonti/blob/1.0.0/system/cache.phpnvd
- github.com/Cotonti/Cotonti/issues/1894nvd
- github.com/Cotonti/Cotonti/pull/1897nvd
- www.vulncheck.com/advisories/cotonti-1.0.0-php-object-injection-via-comments-plugin-edit-action-cb-parameternvd
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