Medium severity · published Jun 16, 2023
CVE-2023-2787
Mattermost fails to check channel membership when accessing message threads, allowing an attacker to access arbitrary posts by using the message threads API
6.5
CVSS
0.5%
EPSS
No
On KEV
Description
Mattermost fails to check channel membership when accessing message threads, allowing an attacker to access arbitrary posts by using the message threads API.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 45% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
Mattermost · Mattermost
7.1.0 through 7.1.9; 7.8.0 through 7.8.4; 7.9.0 through 7.9.3; 7.10.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-2787
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-2787
Vendor Advisory
https://mattermost.com/security-updates/
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