Vulnerability Report

CVE-2026-71294

RCE

Title: Cotonti CMS Comments Plugin PHP Object Injection RCE

RCE

Proof Of Concept

PoC Available for CVE-2026-71294

CWE Category CWE-502

Published Date Aug 05, 2026

Modified Date Aug 26, 2026

Exploit Status Available

Score 7.6 CVSS v3.1

Exploit Probability (EPSS)

0.38%

Vulnerability Summary

CVE-2026-71294: 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).

Impacted Vendors

Analysis in Progress...

Reference Links

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

CVSS v3.1

Source Entity 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c

Severity HIGH

7.6

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-71294 Exploits & PoCs (Proof Of Concept)

GitHub https://github.com/HarshRajSinghania/cotonti-commentswidget-poc

View Code

August 26, 2026 MODIFIED

Vulnerability data updated via NVD.

August 10, 2026 MODIFIED

Vulnerability data updated via NVD.

August 05, 2026 MODIFIED

Vulnerability data updated via NVD.

August 05, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


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

Affected Stack

No specific products linked.