Overview
- Description
- Mattermost versions 9.9.x <= 9.9.0 and 9.5.x <= 9.5.6 fail to validate the source of sync messages and only allow the correct remote IDs, which allows a malicious remote to set arbitrary RemoteId values for synced users and therefore claim that a user was synced from another remote.
- Source
- responsibledisclosure@mattermost.com
- NVD status
- Analyzed
Risk scores
CVSS 3.1
- Type
- Primary
- Base score
- 4.3
- Impact score
- 1.4
- Exploitability score
- 2.8
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- Severity
- MEDIUM
Social media
- Hype score
- Not currently trending
Configurations
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "CBEB8F40-C2DE-4E6F-8772-1BBCA44795A8",
"versionEndExcluding": "9.5.7",
"versionStartIncluding": "9.5.0"
},
{
"criteria": "cpe:2.3:a:mattermost:mattermost_server:9.9.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4BE71910-C7C4-4F33-BFD4-40D2EAA56DB1"
}
],
"operator": "OR"
}
]
}
]