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LOW severity

Mattermost fails to invalidate all active sessions when converting a user to a botGHSA-rhvr-6w8c-6v7w

LOWFix: mattermost/mattermost@faa7e4f

GHSA-rhvr-6w8c-6v7w 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.

Also known asCVE-2025-1412GO-2025-3482
Published
Updated
Affected
3 pkgs
Patched
3 / 3
Exploits
None indexed
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

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 GHSA-rhvr-6w8c-6v7w.

EPSS Exploitation Probability

via FIRST.org ↗
0.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs17th percentile — riskier than 17% of all scored CVEsHighest risk
0.00%0.25%0.50%0.76%0.2%0.3%May 26Sep 26Nov 26

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

3 pkgs affected
🐹github.com/mattermost/mattermost/server/v8🐹github.com/mattermost/mattermost/server/v8🐹github.com/mattermost/mattermost/server/v8

Real-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

3 total 3 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/mattermost/mattermost/server/v8all versions8.0.0-20241217145510-faa7e4f2ea0cgo get github.com/mattermost/mattermost/server/v8@v8.0.0-20241217145510-faa7e4f2ea0c
🐹Gogithub.com/mattermost/mattermost/server/v8≥ 10.4.0-rc1&&< 10.4.210.4.2go get github.com/mattermost/mattermost/server/v8@v10.4.2
🐹Gogithub.com/mattermost/mattermost/server/v8≥ 9.11.0-rc1&&< 9.11.79.11.7go get github.com/mattermost/mattermost/server/v8@v9.11.7

Affected Products

1 product · 2 configurations
Application
mattermost servermattermost
≥ 10.4.0 && < 10.4.2
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    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.

  2. 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 GHSA-rhvr-6w8c-6v7w is resolved across your whole dependency graph.

  3. 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

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.
O3 Security · Impact-Aware SCA

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Mattermost fails to invalidate all active sessions when…