EUVD-2025-175343Published

Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to properly validate team membership permissions in the Add Channel Member API which allows users from one team to access user metadata and channel membership information from o…

Exact source revision recorded 2 Nov 2026 23:59:27 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

euvd · EUVD-2025-175343

Published

Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to properly validate team membership permissions in the Add Channel Member API which allows users from one team to access user metadata and channel membership information from other teams via the API endpoint

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Nov 13, 2025, 5:32:03 PM

dateUpdated: Nov 13, 2025, 6:01:46 PM

Source published: Nov 13, 2025, 5:32:03 PM (timezone not stated)
Source modified: Nov 13, 2025, 6:01:46 PM (timezone not stated)
Observed here: 2 Nov 2026 23:59:27 UTC
Source terms: ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.

EUVD CVSS 3.1 · 3.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N