CVE-2026-93872
Cotonti 1.0.0 PHP Object Injection via Comments Plugin Edit Action cb Parameter
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-502 |
| Vendor | cotonti |
| Product | cotonti |
| Published | Sep 18, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Cotonti / Cotonti
1.0.0 ≤ 1.0.0
References
github.com: https://github.com/Cotonti/Cotonti/issues/1894 github.com: https://github.com/Cotonti/Cotonti/pull/1897 github.com: https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/comments/controllers/actions/EditAction.php github.com: https://github.com/Cotonti/Cotonti/blob/1.0.0/system/cache.php github.com: https://github.com/Cotonti/Cotonti vulncheck.com: https://www.vulncheck.com/advisories/cotonti-1.0.0-php-object-injection-via-comments-plugin-edit-action-cb-parameter
Credits
🔍 Harsh Raj Singhania