Improper Authentication Validation
🗓️ 06 Apr 2026 15:23:19Reported by Veracode Vulnerability DatabaseType 
veracode🔗 sca.analysiscenter.veracode.com👁 23 Views
| Reporter | Title | Published | Views | Family All 29 |
|---|---|---|---|---|
 | The vulnerability of the Mattermost instant messaging application, related to the improper implementation of authentication algorithms, allows attackers to circumvent security restrictions and gain unauthorized access to protected information. | 5 Dec 202500:00 | – | bdu_fstec |
 | CVE-2025-12421 | 27 Nov 202519:23 | – | circl |
 | Mattermost 安全漏洞 | 27 Nov 202500:00 | – | cnnvd |
 | CVE-2025-12421 | 27 Nov 202517:47 | – | cve |
 | CVE-2025-12421 Account Takeover via Code Exchange Endpoint | 27 Nov 202517:47 | – | cvelist |
 | EUVD-2025-199833 | 27 Nov 202518:30 | – | euvd |
 | Mattermost fails to to verify the token used during code exchange | 27 Nov 202518:30 | – | 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 |
 | Vulnerabilities fixed in Mattermost | 28 Nov 202509:53 | – | ncsc |
 | CVE-2025-12421 | 27 Nov 202518:15 | – | nvd |
10
Node
OR
microsoftwindows_server_2008Range8.0.0-20240619142046-8181a9ddffc0–8.0.0-20251015091448-abbf01b9db45go
microsoftwindows_server_2008Range0.0.0-20240209181221-674f549daf0e–8.0.0-20251016131338-dad6bd7a1509go
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01 Aug 2026 15:36Current
6Medium risk
Vulners AI Score6
CVSS 3.19.9
EPSS0.00346
SSVC