CVE-2025-6226 — IDOR in CreatePost API allows for timeboxed message disclosure
Mattermost versions 10.5.x <= 10.5.6, 10.8.x <= 10.8.1, 10.7.x <= 10.7.3, 9.11.x <= 9.11.16 fail to verify authorization when retrieving cached posts by PendingPostID which allo…
Published: 2025-07-18 · CVSS: 6.5 · CVSS 3.1
Mattermost versions 10.5.x <= 10.5.6, 10.8.x <= 10.8.1, 10.7.x <= 10.7.3, 9.11.x <= 9.11.16 fail to verify authorization when retrieving cached posts by PendingPostID which allows an authenticated user to read posts in private channels they don't have access to via guessing the PendingPostID of recently created posts.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7