Medium severity · published Jan 9, 2025
CVE-2025-20033
DoS via custom post type for sysconsole plugin readers
6.5
CVSS
0.6%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
Mattermost · Mattermost
10.2.0; 9.11.0 through 9.11.5; 10.0.0 through 10.0.3; 10.1.0 through 10.1.3 · source: vendor
MS
Mattermost Server · Mattermost
9.11.0 before 9.11.6; 10.0.0 before 10.0.4; 10.1.0 before 10.1.4; 10.2.0 before 10.2.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-20033
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-20033
Vendor Advisory
https://mattermost.com/security-updates
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