Medium severity · published Feb 9, 2024
CVE-2024-1402
Mattermost fails to check if a custom emoji reaction exists when sending it to a post and to limit the amount of custom emojis allowed to be added in a post, allowing an attacker…
4.3
CVSS
0.5%
EPSS
No
On KEV
Description
Mattermost fails to check if a custom emoji reaction exists when sending it to a post and to limit the amount of custom emojis allowed to be added in a post, allowing an attacker sending a huge amount of non-existent custom emojis in a post to crash the mobile app of a user seeing the post and to crash the server due to overloading when clients attempt to retrive the aforementioned post.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MS
Mattermost Server · Mattermost
through 8.1.7; 9.0.0 through 9.1.4; 9.2.0 through 9.2.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-1402
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-1402
Vendor Advisory
https://mattermost.com/security-updates
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