All intelligence
// vulnerability record
cached · NVD via COSMOS syncCVE-2026-6046
MEDIUMpublished 2026-06-12 17:16 UTC · 13 days ago · modified 2026-06-15 20:56 UTC
5.3
CVSS / 10
// description
Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 fail to validate that a username returned during bot registration belongs to a bot account, which allows an unprivileged attacker to intercept private messages sent by plugins via direct message channels by pre-registering a user account with a predictable plugin bot username.. Mattermost Advisory ID: MMSA-2026-00649
// cvss 3.1 vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
// weaknesses (CWE)
- CWE-200