PT-2026-2026 · Wikimedia Foundation · Campaignevents Extension+1

Daimona · Published 2026-01-09 · Updated 2026-01-09 · CVE-2026-0817

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Name of the Vulnerable Software and Affected Versions MediaWiki - CampaignEvents extension versions 1.39 through 1.45

Description A missing authorization flaw exists in the Wikimedia Foundation MediaWiki - CampaignEvents extension, potentially allowing privilege abuse. The issue relates to the CampaignEvents API, where missing authorization could expose meeting and chat URLs.

Recommendations Update to a version later than 1.45. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2026-0817

Affected Products

Campaignevents Extension

Mediawiki

References · 7

• https://osv.dev/vulnerability/CVE-2026-0817 · Vendor Advisory
• https://gerrit.wikimedia.org/r/q/I7ed0049691258c8bd2555e599b9b88490fbe3358 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-0817 · Security Note
• https://t.me/cveNotify/148275 · Telegram Post
• https://phabricator.wikimedia.org/T410560 · Note
• https://t.me/CVEtracker/41851 · Telegram Post
• https://twitter.com/CVEnew/status/2009663200199852413 · Twitter Post