CVE-2025-54499
published 2025-10-16CVE-2025-54499: 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…
PriorityP417low3.7CVSS 3.1
AVNACHPRNUINSUCLINAN
EPSS
0.25%
16.6th percentile
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
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| github.com | mattermost_mattermost-server | >= 10.11.0 < 10.11.3 | 10.11.3 |
| github.com | mattermost_mattermost-server | >= 10.11.0+incompatible < 10.11.3+incompatible | 10.11.3+incompatible |
| github.com | mattermost_mattermost-server | >= 10.5.0 < 10.5.11 | 10.5.11 |
| github.com | mattermost_mattermost-server | >= 10.5.0+incompatible < 10.5.11+incompatible | 10.5.11+incompatible |
| github.com | mattermost_mattermost_server_v8 | >= 0 < 8.0.0-20250728063359-38208b8f065f | 8.0.0-20250728063359-38208b8f065f |
| mattermost | mattermost | 10.11.0 – 10.11.2 | — |
| mattermost | mattermost | 10.5.0 – 10.5.10 | — |
| mattermost | mattermost_server | >= 10.11.0 < 10.11.3 | 10.11.3 |
| mattermost | mattermost_server | >= 10.5.0 < 10.5.11 | 10.5.11 |
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OSV
Mattermost has an Observable Timing Discrepancy vulnerability in github.com/mattermost/mattermost-server
osv·2025-10-30
CVE-2025-54499 Mattermost has an Observable Timing Discrepancy vulnerability in github.com/mattermost/mattermost-server
Mattermost has an Observable Timing Discrepancy vulnerability in github.com/mattermost/mattermost-server
Mattermost has an Observable Timing Discrepancy vulnerability in github.com/mattermost/mattermost-server
OSV
Mattermost has an Observable Timing Discrepancy vulnerability
osv·2025-10-16
CVE-2025-54499 [LOW] Mattermost has an Observable Timing Discrepancy vulnerability
Mattermost has an Observable Timing Discrepancy vulnerability
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.
GHSA
Mattermost has an Observable Timing Discrepancy vulnerability
ghsa·2025-10-16
CVE-2025-54499 [LOW] CWE-208 Mattermost has an Observable Timing Discrepancy vulnerability
Mattermost has an Observable Timing Discrepancy vulnerability
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.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2025-10-16
Published