What’s Vulnerable › Vulnerabilities
CVE-2023-5193: System Role with manage posts permission can read posts of Direct Messages
- Severity: low (CVSS 2.7 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.6% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2023-09-29 · updated 2026-06-17
- Weakness: CWE-863
Description
Mattermost fails to properly check permissions when retrieving a post allowing for a System Role with the permission to manage channels to read the posts of a DM conversation.
Affected products
- Mattermost App Framework: from 7.0.0 before 7.8.10; from 8.0.0 before 8.0.2; from 8.1.0 before 8.1.1 — fixed in 7.8.10, 8.0.2, 8.1.1
How to fix
Upgrade to a fixed version: Mattermost App Framework 7.8.10, 8.0.2, 8.1.1. Check the vendor advisory for mitigations.
References
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