Missing Authorization Vulnerability in Wikimedia Foundation MediaWiki CampaignEvents Extension

CVE-2026-0817

What is CVE-2026-0817?

The MediaWiki CampaignEvents extension, developed by the Wikimedia Foundation, is affected by a missing authorization vulnerability that allows for privilege escalation. This flaw could enable unauthorized users to exploit the system and access restricted functionalities. The issue impacts versions 1.39 through 1.45 of the extension, making it crucial for users to apply necessary patches to mitigate potential risks.

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