CVE-2025-55074GO-2025-4133GHSA-9HH7-6558-QFP2
Channel member objects leak read status
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 10.5.12+incompatible, 10.11.4+incompatible, 10.11.4, 10.5.12, 8.0.0-20250905150616-ba86dfc5876b6
- 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 <= 10.11.3, 10.5.x <= 10.5.11 fail to enforce access permissions on the Agents plugin which allows other users to determine when users had read channels via channel member objects
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 10.11.3; From 10.5.0 · through 10.5.11
- github.com/mattermost/mattermost-serverGo
From 10.5.0+incompatible · fixed in 10.5.12+incompatible; From 10.11.0+incompatible · fixed in 10.11.4+incompatible
- github.com/mattermost/mattermost-server/v5Go
All versions
- github.com/mattermost/mattermost-server/v6Go
All versions
- github.com/mattermost/mattermost/server/v8Go
All versions
- github.com/mattermost/mattermost-serverGo
From 10.11.0 · fixed in 10.11.4
- github.com/mattermost/mattermost-serverGo
From 10.5.0 · fixed in 10.5.12
- github.com/mattermost/mattermost/server/v8Go
fixed in 8.0.0-20250905150616-ba86dfc5876b6