CVE-2026-58520CWE-601

UrlShortener defaults to ineffective validation open to third-party redirects

Medium · published July 1, 2026

CVSS v4.0
6.9
EPSS
0%
Percentile
19.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
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
EPSS
0.00282 · 19.7th percentile
Weakness
CWE-601 · URL Redirection to Untrusted Site ('Open Redirect')
Published
2026-07-01T17:14Z
EPSS history
Timeline
  • 01 JUL 17:14Z
    UrlShortener defaults to ineffective validation open to third-party redirects
    cvelistv5