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CVE-2025-20033

Date: January 9, 2025

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.

Severity Score

Related Resources (5)

https://github.com/advisories/GHSA-2549-xh72-qrpm
https://nvd.nist.gov/vuln/detail/CVE-2025-20033
https://github.com/mattermost/mattermost
https://mattermost.com/security-updates
https://www.mend.io/vulnerability-database/CVE-2025-20033

Severity Score

Weakness Type (CWE)

Improper Validation of Specified Type of Input

CWE-1287

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): LOW

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