CVE-2025-20621

Webapp crash via object that can't be cast to String in Attachment Field

State: Published
Severity: 6.5 Medium
Published: Jan 16, 2025
Updated: Jan 16, 2025
Reserved: Jan 16, 2025

Description

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 handle posts with attachments containing fields that cannot be cast to a String, which allows an attacker to cause the webapp to crash via creating and sending such a post to a channel.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	Mattermost

Weaknesses

CWE-1287 Improper Validation of Specified Type of Input

Affected Products

Product	Versions
MattermostMattermost	10.2.0 through 10.2.0Affected 9.11.0 through 9.11.5Affected 10.0.0 through 10.0.3Affected 10.1.0 through 10.1.3Affected 10.3.0Not affected 2.23.0Not affected 10.2.1Not affected 9.11.6Not affected 10.0.4Not affected 10.1.4Not affected

References

https://mattermost.com/security-updates

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