CVE-2025-1412 is a low-severity (CVSS 3.1) CWE-384 vulnerability in github.com/mattermost/mattermost/server/v8. A fix is available for github.com/mattermost/mattermost/server/v8 — see the affected versions and patch details below.
Session Persistence After User-to-Bot Conversion
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2025-1412.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
github.com/mattermost/mattermost/server/v8🐹github.com/mattermost/mattermost/server/v8🐹github.com/mattermost/mattermost/server/v8Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
Mattermost versions 9.11.x <= 9.11.6, 10.4.x <= 10.4.1 fail to invalidate all active sessions when converting a user to a bot, with allows the converted user to escalate their privileges depending on the permissions granted to the bot.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/mattermost/mattermost/server/v8 | all versions | 8.0.0-20241217145510-faa7e4f2ea0cgo get github.com/mattermost/mattermost/server/v8@v8.0.0-20241217145510-faa7e4f2ea0c |
| 🐹Go | github.com/mattermost/mattermost/server/v8 | ≥ 10.4.0-rc1&&< 10.4.2 | 10.4.2go get github.com/mattermost/mattermost/server/v8@v10.4.2 |
| 🐹Go | github.com/mattermost/mattermost/server/v8 | ≥ 9.11.0-rc1&&< 9.11.7 | 9.11.7go get github.com/mattermost/mattermost/server/v8@v9.11.7 |
Affected Products
mattermost servermattermostDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/mattermost/mattermost/server/v8, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/mattermost/mattermost/server/v8 to 8.0.0-20241217145510-faa7e4f2ea0c or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-1412 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
Frequently Asked Questions
Is CVE-2025-1412 in your dependencies?
Find it across Go, including transitive dependencies.