4.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
4.7 Medium
AI Score
Confidence
High
0.0005 Low
EPSS
Percentile
17.0%
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.
[
{
"defaultStatus": "unaffected",
"product": "Mattermost",
"vendor": "Mattermost",
"versions": [
{
"lessThanOrEqual": "8.1.7",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "9.1.4",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "9.2.3",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "9.3.0"
},
{
"status": "unaffected",
"version": "9.2.4"
},
{
"status": "unaffected",
"version": "9.1.5"
},
{
"status": "unaffected",
"version": "8.1.8"
}
]
}
]
4.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
4.7 Medium
AI Score
Confidence
High
0.0005 Low
EPSS
Percentile
17.0%