Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 with the Jira plugin enabled and Mattermost Jira plugin versions <=4.4.0 fail to enforce authentication and issue-key path restrictions in the Jira plugin, which allows an unauthenticated attacker who knows a valid user ID to issue authenticated GET and POST requests to the Jira server via crafted plugin payloads that spoof the user ID and inject arbitrary issue key paths. Mattermost Advisory ID: MMSA-2025-00555
CVE-2025-14273
This high-severity CVE scores 7.2 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 70% 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).
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.2
- EG Score
- 7.2(medium)
- EG Risk
- —
- EPSS
- 14.7%
- KEV
- Not listed
Published
December 22, 2025
Last Modified
December 29, 2025
References (1)
- responsibledisclosure@mattermosthttps://mattermost.com/security-updates
Affected Packages
(5 across 1 ecosystem)
Go(5)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| github.com/mattermost/mattermost-plugin-jira | — | — | — |
| github.com/mattermost/mattermost-server | — | — | — |
| github.com/mattermost/mattermost-server/v5 | — | — | — |
| github.com/mattermost/mattermost-server/v6 | — | — | — |
| github.com/mattermost/mattermost/server/v8 | — | 8.0.0-20251121122154-b57c297c6d7a | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 41× 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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- 2026-07-06 16:26 UTCEPSS rescore
- 2026-07-06 07:32 UTCOSV refresh
- 2026-07-06 02:22 UTCEPSS rescore
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- 2026-07-06 02:22 UTCEPSS rescore
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- 2026-06-17 18:44 UTCOSV refresh
- 2026-06-17 17:52 UTCEPSS rescore
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- 2026-05-31 00:16 UTCEPSS rescore
- 2026-05-31 00:16 UTCEPSS rescore
- 2026-05-29 17:09 UTCEG score recompute
- 2026-05-29 13:44 UTCEPSS rescore
Frequently asked(5)
What is CVE-2025-14273?
When was CVE-2025-14273 disclosed?
Is CVE-2025-14273 actively exploited?
What is the CVSS score of CVE-2025-14273?
How do I remediate CVE-2025-14273?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-14273
Is Your Infrastructure Affected by CVE-2025-14273?
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