low3.1
CVE-2025-54499
Mattermost has an Observable Timing Discrepancy vulnerability
Impact
Mattermost versions 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to use constant-time comparison for sensitive string comparisons which allows attackers to exploit timing oracles to perform byte-by-byte brute force attacks via response time analysis on Cloud API keys and OAuth client secrets.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost/server/v8 | < 8.0.0-20250728063359-38208b8f065f | 8.0.0-20250728063359-38208b8f065f |
| go | github.com/mattermost/mattermost-server | >= 10.5.0, < 10.5.11 | 10.5.11 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mattermost | Mattermost Server | from 10.5.0 before 10.5.11 from 10.11.0 before 10.11.3 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://mattermost.com/security-updates
- https://github.com/advisories/GHSA-xr3w-rmvj-f6m7
- https://nvd.nist.gov/vuln/detail/CVE-2025-54499
- https://github.com/mattermost/mattermost/commit/38208b8f065f0786eac0e968f9d754b91b62878c
- https://github.com/mattermost/mattermost/commit/97a4c7839cf5610cfe17c52042878aebb7678372