How this vulnerability can be exploited
This issue can be reached over the network, attack complexity is high, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity none, availability none.
CVSS metrics in full
The score comes from this vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
- Attack vector: Network — reachable from anywhere that can route to the service.
- Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
- Privileges required: Low — an ordinary user account is enough.
- User interaction: None — nobody has to be tricked into anything.
- Scope: Unchanged — the damage stays inside the vulnerable component.
- Confidentiality impact: Low — limited, and the attacker does not choose what is affected.
- Integrity impact: None.
- Availability impact: None.
Weakness class
CVE-2025-9081 is classified as CWE-639: Authorization Bypass Through User-Controlled Key. An object is selected by an identifier from the request without checking the caller owns it.
Affected software
CVE-2025-9081 is recorded against 6 packages.
- github.com/mattermost/mattermost-plugin-boards
- github.com/mattermost/mattermost-server
- github.com/mattermost/mattermost-server/v5
- github.com/mattermost/mattermost-server/v6
- github.com/mattermost/mattermost/server/v8
- mattermost-server (from 10.5.0 up to 10.5.9)
Timeline and source
Published on 19 September 2025 and last revised on 3 March 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.
References
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Web)
github.com (Package)
mattermost.com (Web)
pkg.go.dev (Web)
Other advisories for this package
github.com/mattermost/mattermost-plugin-boards has other advisories on record. If you are patching this one, these are worth checking on the same host:
Same weakness in other software
These advisories are the same class of weakness (CWE-639: Authorization Bypass Through User-Controlled Key) in other software:
