CVEvulnerability
CVE-2026-93872
7.7 HIGH
Official page ↗
- Status
- Deferred
- Published
- 2026-09-18
- Last modified
- 2026-09-22
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 7.7 HIGH — CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-502
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.
Related
Weakness · CWE (1)
- CWE-502 Deserialization of Untrusted Data weakness
References
- https://github.com/Cotonti/Cotonti 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/issues/1894 github.com
- https://github.com/Cotonti/Cotonti/pull/1897 github.com
- https://www.vulncheck.com/advisories/cotonti-1.0.0-php-object-injection-via-comments-plugin-edit-action-cb-parameter www.vulncheck.com