CVE-2025-20033Medium· 4.3▾ SunlitMattermost Improper Validation of Specified Type of Input vulnerability
▾ Sunlit zone — Low / medium · no exploitation signal
impact 23.7 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
0.6%
Mattermost versions 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate post types, which allows attackers to deny service to users with the sysconsole_read_plugins permission via creating a post with the custom_pl_notification type and specific props.
github.com/mattermost/mattermost/server/v8 >= 9.11.0, < 9.11.16github.com/mattermost/mattermost/server/v8 >= 10.0.0, < 10.0.4github.com/mattermost/mattermost/server/v8 >= 10.1.0, < 10.1.4github.com/mattermost/mattermost/server/v8 >= 10.2.0, < 10.2.1github.com/mattermost/mattermost/server/v8 < 8.0.0-20250102081831-64c566a8280bUpgrade to a patched release:
github.com/mattermost/mattermost/server/v8 9.11.16github.com/mattermost/mattermost/server/v8 10.0.4github.com/mattermost/mattermost/server/v8 10.1.4github.com/mattermost/mattermost/server/v8 10.2.1github.com/mattermost/mattermost/server/v8 8.0.0-20250102081831-64c566a8280bConnected by shared product, vendor, weakness, or advisory.
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