CVE-2025-14822GHSA-9R42-RHW3-2222GO-2026-4325
DoS from quadratic complexity in model.ParseHashtags
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 10.11.9, 11.2.0, 10.11.9+incompatible, 11.2.0+incompatible
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
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
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Mattermost Mattermost
From 10.11.0 · through 10.11.8
- github.com/mattermost/mattermost-serverGo
From 10.11.0 · fixed in 10.11.9
- github.com/mattermost/mattermost-serverGo
From 11.0.0 · fixed in 11.2.0
- github.com/mattermost/mattermost-serverGo
From 10.11.0+incompatible · fixed in 10.11.9+incompatible; From 11.0.1+incompatible · fixed in 11.2.0+incompatible