CVE-2025-14273 Mattermost Jira plugin user spoofing enables Jira request forgery.
Unauthenticated attackers can spoof user IDs to issue arbitrary Jira requests via the Mattermost Jira plugin, bypassing authentication and path restrictions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-14273?
CVE-2025-14273 is a high-severity missing authorization vulnerability in Mattermost Mattermost Server, published on 22 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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
Weakness: CWE-303
Which versions are affected by CVE-2025-14273?
9 open source packages ship an affected version, including github.com/mattermost/mattermost/server/v8, github.com/mattermost/mattermost-plugin-jira and github.com/mattermost/mattermost-server. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/mattermost/mattermost/server/v8 Go | All versions | 8.0.0-20251121122154-b57c297c6d7a |
github.com/mattermost/mattermost/server/v8 Go | All versions | 8.0.0-20251121122154-b57c297c6d7a |
github.com/mattermost/mattermost/server/v8 Go | All versions | 8.0.0-20251121122154-b57c297c6d7a |
github.com/mattermost/mattermost-plugin-jira Go | All versions | None |
github.com/mattermost/mattermost-plugin-jira Go | All versions | 4.4.1 |
github.com/mattermost/mattermost-plugin-jira Go | All versions | 4.4.1 |
3 more packages
github.com/mattermost/mattermost-server Go | All versions | None |
github.com/mattermost/mattermost-server/v5 Go | All versions | None |
github.com/mattermost/mattermost-server/v6 Go | All versions | None |
Products include Mattermost Mattermost Server.
How do I fix CVE-2025-14273?
Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20251121122154-b57c297c6d7a or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-14273 being exploited?
There is no known exploitation of CVE-2025-14273 in the wild and no public exploit code.
Other vulnerabilities in Mattermost Mattermost Server
- CVE-2025-12419 Account takeover on OAuth/OpenID-enabled servers
- CVE-2025-12421 Account Takeover via Code Exchange Endpoint
- CVE-2025-4981 Path Traversal Leading to RCE by Any Authenticated Mattermost User
- CVE-2025-20051 Arbitrary file read via block duplication in Mattermost Boards
- CVE-2025-25279 Arbitrary file read in Mattermost Boards via import & export board archive
Sources
Also known as GHSA-qvmc-92vg-6r35, GO-2026-4275.