Description
Mattermost versions 8.1.x before 8.1.9, 9.2.x before 9.2.5, and 9.3.0 fail to sanitize the metadata on posts containing permalinks under specific conditions, which allows an authenticated attacker to access the contents of individual posts in channels they are not a member of.
References (1)
Core 1
Core References
Vendor Advisory
https://mattermost.com/security-updates
Scores
CVSS v3
4.3
EPSS
0.0023
EPSS Percentile
45.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-284
Status
published
Products (3)
mattermost/mattermost
9.3.0 - 9.3.1Go
mattermost/mattermost_server
9.3.0
mattermost/mattermost_server
8.1.0 - 8.1.9
Published
Feb 29, 2024
Tracked Since
Feb 18, 2026