Auth bypass in Mattermost
CVE-2023-5193
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.
Vulnerability class: Broken Access Control
EPSS: 0.005 (38.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Mattermost — versions 0, 8.1.0, 8.0.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- responsibledisclosure@mattermost.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2023-5193?
- CVE-2023-5193 is a medium-severity vulnerability in Mattermost, classified under Incorrect Authorization. CVSS score: 4.9/10. Published 2023-09-29.
- How severe is CVE-2023-5193?
- Medium severity. CVSS v3 base score is 4.9 out of 10.
- Is CVE-2023-5193 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.