CVE-2025-55073 — MS Teams plugin OAuth allows editing arbitrary posts
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 …
Published: 2025-11-14 · CVSS: 5.4 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7