CVE-2025-27936GHSA-2J87-P623-8CC2GO-2025-3618
Webhook Secret Exposure via Timing attack in MSteams plugin
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 10.5.2, 8.0.0-20250314142426-c049748b8863, 2.1.0, 10.5.2+incompatible, 8.0.0-20250218121836-2b5275d87136
- 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 Plugin MSTeams versions <2.1.0 and Mattermost Server versions 10.5.x <=10.5.1 with the MS Teams plugin enabled fail to perform constant time comparison on a MSTeams plugin webhook secret which allows an attacker to retrieve the webhook secret of the MSTeams plugin via a timing attack during webhook secret comparison.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Mattermost Mattermost
From 10.5.0 · through 10.5.1
- github.com/mattermost/mattermost/server/v8Go
From 10.5.0 · fixed in 10.5.2
- github.com/mattermost/mattermost/server/v8Go
fixed in 8.0.0-20250314142426-c049748b8863
- github.com/mattermost/mattermost-plugin-msteamsGo
fixed in 2.1.0
- github.com/mattermost/mattermost-plugin-msteamsGo
All versions
- github.com/mattermost/mattermost-serverGo
From 10.5.0+incompatible · fixed in 10.5.2+incompatible
- github.com/mattermost/mattermost-server/v5Go
All versions
- github.com/mattermost/mattermost-server/v6Go
All versions
- github.com/mattermost/mattermost/server/v8Go
fixed in 8.0.0-20250218121836-2b5275d87136