Mattermost versions 10.11.x <= 10.11.4 fail to validate redirect URLs on the /error page, which allows an attacker to redirect a victim to a malicious site via a crafted link opened in a new tab.
Exact source revision recorded 5 Nov 2026 02:55:25 UTC. It does not establish the source's current position. Latest evidence.
euvd · EUVD-2025-203890
PublishedMattermost versions 10.11.x <= 10.11.4 fail to validate redirect URLs on the /error page, which allows an attacker to redirect a victim to a malicious site via a crafted link opened in a new tab.
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: Dec 17, 2025, 12:19:17 PM
dateUpdated: Dec 17, 2025, 2:45:57 PM
- Source published
- Dec 17, 2025, 12:19:17 PM (timezone not stated)
- Source modified
- Dec 17, 2025, 2:45:57 PM (timezone not stated)
- Observed here
- 5 Nov 2026 02:55:25 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:N/UI:R/S:U/C:N/I:L/A:N