Mattermost Authentication Bypass
🗓️ 05 Dec 2025 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec🔗 bdu.fstec.ru👁 19 Views
| Reporter | Title | Published | Views | Family All 21 |
|---|---|---|---|---|
 | Mattermost security vulnerabilities | 1 Dec 202500:00 | – | cnnvd |
 | CVE-2025-12756 | 1 Dec 202519:51 | – | cve |
 | CVE-2025-12756 Insecure Direct Object Reference in Mattermost Boards Plugin Enables Unauthorised Comment Deletion | 1 Dec 202519:51 | – | cvelist |
 | EUVD-2025-200087 | 1 Dec 202521:30 | – | euvd |
 | Mattermost fails to validate user permissions when deleting comments in Boards | 1 Dec 202521:30 | – | github |
 | Mattermost Server 10.5.x <= 10.5.12 / 10.11.x <= 10.11.4 / 10.12.x <= 10.12.1 / 11.0.x <= 11.0.2 Multiple Vulnerabilities (CVE-2025-12421, MMSA-2025-00526, CVE-2025-12756) | 10 Dec 202500:00 | – | nessus |
 | CVE-2025-12756 | 1 Dec 202519:51 | – | mend |
 | CVE-2025-12756 | 1 Dec 202520:15 | – | nvd |
 | CVE-2025-12756 Insecure Direct Object Reference in Mattermost Boards Plugin Enables Unauthorised Comment Deletion | 1 Dec 202519:51 | – | osv_cve |
| GHSA-P6GJ-JC38-X2M7 Mattermost fails to validate user permissions when deleting comments in Boards | 1 Dec 202521:30 | – | osv_ghsa |
10
Node
OR
| Source | Link |
|---|---|
| mattermost | www.mattermost.com/security-updates |
| web | www.web.nvd.nist.gov/view/vuln/detail |
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05 Dec 2025 00:00Current
8.7High risk
Vulners AI Score8.7
CVSS 24
CVSS 34.3
EPSS0.00182