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Some sources, documents or advisories need attention: 275/275 feeds/APIs · 469/469 docs · 8/9 advisories · checked 11:34 UTC Customize Public modeDiscuss ChangeIntel on Discord
EUVD-2025-203891Published

Mattermost versions 10.11.x <= 10.11.6 and Mattermost GitHub plugin versions <=2.4.0 fail to validate plugin bot identity in reaction forwarding which allows attackers to hijack the GitHub reaction feature to make users add reactions to arb…

Exact source revision recorded 5 Nov 2026 01:00:43 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

euvd · EUVD-2025-203891

Published

Mattermost versions 10.11.x <= 10.11.6 and Mattermost GitHub plugin versions <=2.4.0 fail to validate plugin bot identity in reaction forwarding which allows attackers to hijack the GitHub reaction feature to make users add reactions to arbitrary GitHub objects via crafted notification posts.

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, 12:11:25 PM

dateUpdated: Dec 17, 2025, 4:48:08 PM

Source published
Dec 17, 2025, 12:11:25 PM (timezone not stated)
Source modified
Dec 17, 2025, 4:48:08 PM (timezone not stated)
Observed here
5 Nov 2026 01:00:43 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 · 3.0 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:N

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 10 Nov 11:34 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current

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