What’s Vulnerable › Vulnerabilities
CVE-2024-43780: Unauthorized channel file upload
- Severity: medium (CVSS 4.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2024-08-22 · updated 2026-06-17
- Weakness: CWE-284
Description
Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.0, 9.8.x <= 9.8.2 fail to enforce permissions which allows a guest user with read access to upload files to a channel.
Affected products
- Mattermost: from 9.5.0 before 9.5.8; from 9.8.0 before 9.8.3; from 9.9.0 before 9.9.2; 9.10.0 — fixed in 9.5.8, 9.8.3, 9.9.2
How to fix
Upgrade to a fixed version: Mattermost 9.5.8, 9.8.3, 9.9.2. Check the vendor advisory for mitigations.
References
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