CVE-2025-20086 is a medium-severity vulnerability affecting Mattermost server versions 10.2.0 and earlier, 9.11.5 and earlier, 10.0.3 and earlier, and 10.1.3 and earlier. An authenticated attacker can exploit improper post prop validation to trigger a denial-of-service condition, causing the server to crash. The attack is network-based, low complexity, and requires only low privileges, resulting in high availability impact. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 10.0.0, < 10.0.4CPE matchmatch criteria | cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* | ||
>= 10.1.0, < 10.1.4CPE matchmatch criteria | cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* | ||
10.2.0CPE matchmatch criteria | cpe:2.3:a:mattermost:mattermost_server:10.2.0:-:*:*:*:*:*:* | ||
>= 9.11.0, < 9.11.6CPE matchmatch criteria | cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* | ||
>= 10.0.0, <= 10.0.3CPE match | cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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