Mattermost versions 10.7.x <= 10.7.0, 10.6.x <= 10.6.2, 10.5.x <= 10.5.3, 9.11.x <= 9.11.12 fails to properly invalidate personal access tokens upon user deactivation, allowing deactivated users to maintain full system access by exploiting access token validation flaws via continued usage of previously issued tokens.
CVE-2025-3230
This medium-severity CVE scores 5.4 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 59% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- Lower severity and no public exploit yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.4
- EG Score
- 5.4(medium)
- EG Risk
- —
- EPSS
- 8.5%
- KEV
- Not listed
Published
May 30, 2025
Last Modified
October 15, 2025
References (1)
- responsibledisclosure@mattermosthttps://mattermost.com/security-updates
Affected Packages
(4 across 1 ecosystem)
Go(4)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| github.com/mattermost/mattermost-server | — | 10.7.1+incompatible | — |
| github.com/mattermost/mattermost-server/v5 | — | — | — |
| github.com/mattermost/mattermost-server/v6 | — | — | — |
| github.com/mattermost/mattermost/server/v8 | — | 8.0.0-20250402193107-65343f84a783 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 11× in last 7d / 46× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-22 14:07 UTCEPSS rescore
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- 2026-05-30 04:30 UTCEG score recompute
- 2026-05-29 13:44 UTCEPSS rescore
Frequently asked(5)
What is CVE-2025-3230?
When was CVE-2025-3230 disclosed?
Is CVE-2025-3230 actively exploited?
What is the CVSS score of CVE-2025-3230?
How do I remediate CVE-2025-3230?
Dependency Blast Radius
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Is Your Infrastructure Affected by CVE-2025-3230?
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