The vulnerability of the Mattermost GitHub plugin for instant messaging applications arises from insufficient validation of certain input types. This allows attackers to bypass security restrictions and gain access to read and modify data.
🗓️ 25 Dec 2025 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec🔗 bdu.fstec.ru👁 7 Views
| Reporter | Title | Published | Views | Family All 17 |
|---|---|---|---|---|
 | CVE-2025-13352 | 17 Dec 202515:35 | – | circl |
 | Mattermost 安全漏洞 | 17 Dec 202500:00 | – | cnnvd |
 | CVE-2025-13352 | 17 Dec 202512:11 | – | cve |
 | CVE-2025-13352 Mattermost GitHub Plugin allows unauthorized GitHub reactions via reaction forwarding hijacking | 17 Dec 202512:11 | – | cvelist |
 | EUVD-2025-203891 | 17 Dec 202515:34 | – | euvd |
 | Mattermost GitHub Plugin Bot Identity Validation Bypass Allows Arbitrary GitHub Reaction Injection | 17 Dec 202515:34 | – | github |
 | CVE-2025-13352 | 17 Dec 202513:15 | – | nvd |
 | GHSA-JF5H-XFW4-P8GP Mattermost GitHub Plugin Bot Identity Validation Bypass Allows Arbitrary GitHub Reaction Injection | 17 Dec 202515:34 | – | osv |
| GO-2025-4247 Mattermost GitHub Plugin Bot Identity Validation Bypass Allows Arbitrary GitHub Reaction Injection in github.com/mattermost/mattermost | 22 Dec 202518:15 | – | osv |
| OPENSUSE-SU-2026:21483-1 Security update for govulncheck-vulndb | 30 Jul 202609:09 | – | osv |
10
Node
OR
Data
Build on a solid foundation with Vulners data
We provide the essential building blocks for cybersecurity solutions with comprehensive, structured, and constantly updated vulnerability and exploits data
Api
Power your application with Vulners API
The Vulners REST API offers reliable, high-performance access to vulnerability intelligence, with 99.9% SLA uptime and CDN-backed data delivery for seamless global access
App
Assess and manage vulnerabilities with Vulners tools
Built on top of Vulners' database and SDK, end-user solutions give security professionals and developers lightweight and powerful tools for vulnerability remediation
25 Dec 2025 00:00Current
7.2High risk
Vulners AI Score7.2
CVSS 22.1
CVSS 33
EPSS0.00169