What’s Vulnerable › Vulnerabilities
CVE-2023-6458: Client side path traversal due to lack of route parameters validation
- Severity: critical (CVSS 9.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.6% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2023-12-06 · updated 2026-06-17
- Weakness: CWE-74
Description
Mattermost webapp fails to validate route parameters in/<TEAM_NAME>/channels/<CHANNEL_NAME> allowing an attacker to perform a client-side path traversal.
Affected products
- Mattermost: before 7.8.14; from 8.0.0 before 8.1.5; from 9.0.0 before 9.0.3; from 9.1.0 before 9.1.2 — fixed in 7.8.14, 8.1.5, 9.0.3, 9.1.2
How to fix
Upgrade to a fixed version: Mattermost 7.8.14, 8.1.5, 9.0.3, 9.1.2. Check the vendor advisory for mitigations.
References
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