CVE-2025-55073

Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11, 10.12.x <= 10.12.0 fail to validate the relationship between the post being updated and the MSTeams plugin OAuth flow which allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.4 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
MattermostCNA
5.4 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
CISA-ADPADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 11%
VendorProductVersion
mattermostmattermost_server
10.5.0 ≤
𝑥
< 10.5.12
mattermostmattermost_server
10.11.0 ≤
𝑥
< 10.11.4
mattermostmattermost_server
10.12.0 ≤
𝑥
< 10.12.1
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://mattermost.com/security-updates