CVE-2026-58520 MEDIUM

CVE-2026-58520: UrlShortener defaults to ineffective validation open to third-party redirects

Vendor The Wikimedia Foundation
Product Mediawiki - UrlShortener Extension
Weakness CWE-601 · Open redirect
Published July 1, 2026
Last update July 1, 2026
View on NVD All CVEs

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L

What the vulnerability does

01Description

URL redirection to untrusted site ('open redirect') vulnerability in The Wikimedia Foundation Mediawiki - UrlShortener Extension allows Cross-Site Flashing. This issue affects Mediawiki - UrlShortener Extension: from * before 1.43.9, 1.44.6, 1.45.4.

Key dates

02Disclosure timeline

July 1, 2026 CVE published