CVE-2026-71294

Cotonti CMS Comments Plugin PHP Object Injection via Unrestricted unserialize() in Create/Edit Actions

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).

Affected

Cotonti

CVSS v3.1 CNA

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

EPSS

0.38% chance of exploitation in the next 30 days, 30th percentile

Published

2026-08-05

Updated

2026-08-10

Proof-of-concept exploits (1)

• HarshRajSinghania/cotonti-commentswidget-poc0★ · 2026-09-13

References

• CVE Record
• NVD entry

Related

• CVE-2017-0144
• CVE-2019-0703
• CVE-2020-0796
• CVE-2021-1675
• CVE-2022-38023
• CVE-2023-1545