CVE-2026-0817

5.3 mediumEPSS 0.3%

Medium (5.3) in wikimedia campaignevents. EPSS 0.3% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

5.3 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 19% of CVEs (scores of 2026-10-31)
CWE: CWE-862
Published: 2026-01-09
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

wikimedia:campaignevents

References

https://gerrit.wikimedia.org/r/q/I7ed0049691258c8bd2555e599b9b88490fbe3358
https://phabricator.wikimedia.org/T410560

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