CVE-2025-13352

LOW EPSS 4.2%

Published Dec 17, 20256mo ago · Modified Jun 17, 20262w ago

3.0 CVSS 3.1

Low

Published Dec 17, 2025 6mo ago

Last Modified Jun 17, 2026 2w ago

Description

Mattermost versions 10.11.x <= 10.11.6 and Mattermost GitHub plugin versions <=2.4.0 fail to validate plugin bot identity in reaction forwarding which allows attackers to hijack the GitHub reaction feature to make users add reactions to arbitrary GitHub objects via crafted notification posts.

CVSS Details

Base Score

3.0

Exploitability

1.3

Impact

1.4

Vector string

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

Attack Vector Network

Attack Complexity High

Privileges Required Low

User Interaction Required

Scope Changed

Confidentiality None

Integrity Low

Availability None

Threat Intelligence

EPSS Exploit Probability

4.2% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-1287

Affected Products 1

Vendor	Product	Version	Range
mattermost	mattermost_server	*	≥10.11.0 – <10.11.7

References 1

mattermost.com https://mattermost.com/security-updates

Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.