Missing Authorization vulnerability in Wikimedia Foundation MediaWiki - CampaignEvents extension allows Privilege Abuse.This issue affects MediaWiki - CampaignEvents extension: 1.45, 1.44, 1.43, 1.39.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00013.

Exploitation none

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Wikimedia Foundation MediaWiki - CampaignEvents extension unaffected
Version Status Constraints
1.45 affected
—
1.44 affected
—
1.43 affected
—
1.39 affected
—

Configuration 1 [-]

OR cpe:2.3:a:wikimedia:campaignevents:1.39:*:*:*:*:mediawiki:*:*
cpe:2.3:a:wikimedia:campaignevents:1.43:*:*:*:*:mediawiki:*:*
cpe:2.3:a:wikimedia:campaignevents:1.44:*:*:*:*:mediawiki:*:*
cpe:2.3:a:wikimedia:campaignevents:1.45:*:*:*:*:mediawiki:*:*

No data.

Vendor Product Confidence Versions
Mediawiki Mediawiki — —
Wikimedia Mediawiki-campaignevents Extension — —

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Subscriptions

Vendors Products
Mediawiki Subscribe
Mediawiki Subscribe
Wikimedia Subscribe
Campaignevents Subscribe
Mediawiki-campaignevents Extension Subscribe

Tracking

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://gerrit.wikimedia.org/r/q/I7ed0049691258c8bd2555e599b9b88490fbe3358 cve-icon cve-icon
https://phabricator.wikimedia.org/T410560 cve-icon cve-icon
History

Tue, 10 Feb 2026 20:30:00 +0000

Type Values Removed Values Added
First Time appeared Wikimedia campaignevents
CPEs cpe:2.3:a:wikimedia:campaignevents:1.39:*:*:*:*:mediawiki:*:*
cpe:2.3:a:wikimedia:campaignevents:1.43:*:*:*:*:mediawiki:*:*
cpe:2.3:a:wikimedia:campaignevents:1.44:*:*:*:*:mediawiki:*:*
cpe:2.3:a:wikimedia:campaignevents:1.45:*:*:*:*:mediawiki:*:*
Vendors & Products Wikimedia campaignevents

Mon, 12 Jan 2026 14:45:00 +0000

Type Values Removed Values Added
First Time appeared Mediawiki
Mediawiki mediawiki
Wikimedia
Wikimedia mediawiki-campaignevents Extension
Vendors & Products Mediawiki
Mediawiki mediawiki
Wikimedia
Wikimedia mediawiki-campaignevents Extension

Fri, 09 Jan 2026 18:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Fri, 09 Jan 2026 16:00:00 +0000

Type Values Removed Values Added
Description Missing Authorization vulnerability in Wikimedia Foundation MediaWiki - CampaignEvents extension allows Privilege Abuse.This issue affects MediaWiki - CampaignEvents extension: 1.45, 1.44, 1.43, 1.39.
Title CampaignEvents API missing authorization exposes meeting and chat URLs
Weaknesses CWE-862
References
cve-icon MITRE

Status: PUBLISHED

Assigner: wikimedia-foundation

Published:

Updated: 2026-01-09T17:37:36.036Z

Reserved: 2026-01-09T15:44:08.294Z

Link: CVE-2026-0817

cve-icon Vulnrichment

Updated: 2026-01-09T17:37:30.348Z

cve-icon NVD

Status : Analyzed

Published: 2026-01-09T16:16:08.030

Modified: 2026-02-10T20:20:51.727

Link: CVE-2026-0817

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-01-12T14:38:10Z

Weaknesses