CVSS 3.1
6.5 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HCVE-2025-14822
Medium (6.5) in mattermost mattermost server. EPSS 0.3% chance of exploitation in the next 30 days. Fixed in github.com/mattermost/mattermost-server 10.11.9, 10.11.9+incompatible, 11.2.0.
Mattermost versions 10.11.x <= 10.11.8 fail to validate input size before processing hashtags which allows an authenticated attacker to exhaust CPU resources via a single HTTP request containing a post with thousands space-separated tokens
Severity
- EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 28% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-770, CWE-407
- Published
- Modified
- Record from
- the NVD, synced
Affected
- mattermost:mattermost_server
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-9r42-rhw3-2222 | Go | github.com/mattermost/mattermost-server | >=10.11.0 <10.11.9 | 10.11.9 |
| GHSA-9r42-rhw3-2222 | Go | github.com/mattermost/mattermost-server | >=11.0.0 <11.2.0 | 11.2.0 |
| GO-2026-4325 | Go | github.com/mattermost/mattermost-server | >=10.11.0+incompatible <10.11.9+incompatible >=11.0.1+incompatible <11.2.0+incompatible | 10.11.9+incompatible, 11.2.0+incompatible |