CVE-2025-20086Medium· 6.5▾ SunlitMattermost fails to properly validate post props
▾ Sunlit zone — Low / medium · no exploitation signal
impact 35.8 · 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
0.4%
Mattermost versions 10.2.x <= 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 props which allows a malicious authenticated user to cause a crash via a malicious post.
github.com/mattermost/mattermost/server/v8 >= 10.2.0, < 10.2.1github.com/mattermost/mattermost/server/v8 >= 10.1.0, < 10.1.4github.com/mattermost/mattermost/server/v8 >= 10.0.0, < 10.0.4github.com/mattermost/mattermost/server/v8 >= 9.11.0, < 9.11.6github.com/mattermost/mattermost/server/v8 < 8.0.0-20241127161322-25ff7a3779a5Upgrade to a patched release:
github.com/mattermost/mattermost/server/v8 10.2.1github.com/mattermost/mattermost/server/v8 10.1.4github.com/mattermost/mattermost/server/v8 10.0.4github.com/mattermost/mattermost/server/v8 9.11.6github.com/mattermost/mattermost/server/v8 8.0.0-20241127161322-25ff7a3779a5Connected by shared product, vendor, weakness, or advisory.
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