High severity · published Nov 27, 2023
CVE-2023-40703
Mattermost fails to properly limit the characters allowed in different fields of a block in Mattermost Boards allowing a attacker to consume excessive resources, possibly leading…
7.5
CVSS
0.7%
EPSS
No
On KEV
Description
Mattermost fails to properly limit the characters allowed in different fields of a block in Mattermost Boards allowing a attacker to consume excessive resources, possibly leading to Denial of Service, by patching the field of a block using a specially crafted string.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
Mattermost · Mattermost
through 7.8.12; 8.0.0 through 8.1.3; 9.0.0 through 9.0.1; 9.1.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-40703
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-40703
Vendor Advisory
https://mattermost.com/security-updates
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