4.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
6.7 Medium
AI Score
Confidence
High
0.0005 Low
EPSS
Percentile
17.0%
Mattermost is vulnerable to Denial of Service (DoS). The vulnerability is caused due to the lack of validation for custom emoji reactions. This allows an attacker to send a huge amount of non-existent custom emojis in a post to crash the mobile app of a user seeing the post.
github.com/advisories/GHSA-32h7-7j94-8fc2
github.com/mattermost/mattermost/commit/64cb0ca8af2dbda1afcddd1604460591a4799b81
github.com/mattermost/mattermost/commit/6d2440de9fd774b67e65e3aac4ab8b6ef9aba2d8
github.com/mattermost/mattermost/commit/81190e2da128a6985914ea7023a69ac400513fc4
mattermost.com/security-updates
mattermost.com/security-updates/
4.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
6.7 Medium
AI Score
Confidence
High
0.0005 Low
EPSS
Percentile
17.0%