CVE-2025-20621CWE-1287

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

Medium · published January 16, 2025

CVSS v3.1
6.5
EPSS
0%
Percentile
38.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00459 · 38.8th percentile
Weakness
CWE-1287 · Improper Validation of Specified Type of Input
Published
2025-01-16T18:16Z
EPSS history
Timeline
  • 16 JAN 18:16Z
    Webapp crash via object that can't be cast to String in Attachment Field
    cvelistv5