What’s Vulnerable › Vulnerabilities
CVE-2024-1887: Public channel post content accessible without membership when compliance export is enabled
- 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: 2024-02-29 · updated 2026-06-17
- Weakness: CWE-284
Description
Mattermost fails to check if compliance export is enabled when fetching posts of public channels allowing a user that is not a member of the public channel to fetch the posts, which will not be audited in the compliance export.
Affected products
- Mattermost: before 8.1.9; from 9.2.0 before 9.2.5; from 9.3.0 before 9.3.1 — fixed in 8.1.9, 9.2.5, 9.3.1
How to fix
Upgrade to a fixed version: Mattermost 8.1.9, 9.2.5, 9.3.1. Check the vendor advisory for mitigations.
References
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