CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
AI Score
Confidence
Low
EPSS
Percentile
16.8%
SSVC
Exploitation
none
Automatable
no
Technical Impact
total
Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5 and 9.8.x <= 9.8.1 fail to properly validate that the channel that comes from the sync message is a shared channel, when shared channels are enabled, which allows a malicious remote to add users to arbitrary teams and channels
[
{
"cpes": [
"cpe:2.3:a:mattermost:mattermost:9.9.0:*:*:*:*:*:*:*"
],
"vendor": "mattermost",
"product": "mattermost",
"versions": [
{
"status": "affected",
"version": "9.9.0"
}
],
"defaultStatus": "unknown"
},
{
"cpes": [
"cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*"
],
"vendor": "mattermost",
"product": "mattermost",
"versions": [
{
"status": "affected",
"version": "9.5.0",
"versionType": "semver",
"lessThanOrEqual": "9.5.6"
},
{
"status": "affected",
"version": "9.7.0",
"versionType": "semver",
"lessThanOrEqual": "9.7.5"
},
{
"status": "affected",
"version": "9.8.0",
"versionType": "semver",
"lessThanOrEqual": "9.8.1"
}
],
"defaultStatus": "unknown"
},
{
"cpes": [
"cpe:2.3:a:mattermost:mattermost:9.10.0:*:*:*:*:*:*:*"
],
"vendor": "mattermost",
"product": "mattermost",
"versions": [
{
"status": "affected",
"version": "9.10.0"
}
],
"defaultStatus": "unknown"
},
{
"cpes": [
"cpe:2.3:a:mattermost:mattermost:9.9.1:*:*:*:*:*:*:*"
],
"vendor": "mattermost",
"product": "mattermost",
"versions": [
{
"status": "affected",
"version": "9.9.1"
}
],
"defaultStatus": "unknown"
},
{
"cpes": [
"cpe:2.3:a:mattermost:mattermost:9.5.7:*:*:*:*:*:*:*"
],
"vendor": "mattermost",
"product": "mattermost",
"versions": [
{
"status": "affected",
"version": "9.5.7"
}
],
"defaultStatus": "unknown"
},
{
"cpes": [
"cpe:2.3:a:mattermost:mattermost:9.7.6:*:*:*:*:*:*:*"
],
"vendor": "mattermost",
"product": "mattermost",
"versions": [
{
"status": "affected",
"version": "9.7.6"
}
],
"defaultStatus": "unknown"
},
{
"cpes": [
"cpe:2.3:a:mattermost:mattermost:9.8.2:*:*:*:*:*:*:*"
],
"vendor": "mattermost",
"product": "mattermost",
"versions": [
{
"status": "affected",
"version": "9.8.2"
}
],
"defaultStatus": "unknown"
}
]
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
AI Score
Confidence
Low
EPSS
Percentile
16.8%
SSVC
Exploitation
none
Automatable
no
Technical Impact
total