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Vulnerability record · CVE-2026-71294 · published 5 August 2026

CVE-2026-71294: Deserialization of untrusted data vulnerability

Cotonti CMS's Comments plugin deserializes user-supplied data without restricting the classes that may be instantiated. In plugins/comments/controllers/actions/CreateAction.php, a POST parameter obtained via (trim-only sanitization) is passed to with no restriction, reachable by any member with write access to comments (the default setting in plugins/comments/comments.setup.php).

7.6 CVSS 3.1 High EPSS 0.38% · top 70.7% CWE-502 · Deserialization of untrusted data Deferred
7.6CVSS 3.1 base score
0.38%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
26 Aug 2026Last modified by NVD

Description

Cotonti CMS's Comments plugin deserializes user-supplied data without restricting the classes that may be instantiated. In plugins/comments/controllers/actions/CreateAction.php, a POST parameter obtained via (trim-only sanitization) is passed to with no restriction, reachable by any member with write access to comments (the default setting in plugins/comments/comments.setup.php).

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L

References

LinkTags
https://github.com/Cotonti/Cotonti
https://github.com/Cotonti/Cotonti/blob/master/plugins/comments/controllers/actions/CreateAction.php

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Source: NIST National Vulnerability Database (record CVE-2026-71294), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.