CVE-2026-58520 json
UrlShortener defaults to ineffective validation open to third-party redirects
published 2026-07-01 4 mo ago modified 2026-10-25 14 d ago also EUVD-2026-41099
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 20%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- The Wikimedia Foundation Mediawiki - UrlShortener Extension 1.43.9, 1.44.6, 1.45.4
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.9 | 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 |
| CNA | 4.0 | 6.9 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected products
- The Wikimedia Foundation Mediawiki - UrlShortener Extension
Classification
- Weakness
-
- CWE-601 URL Redirection to Untrusted Site
References
-
phabricator.wikimedia.org
/T418431
issue-tracking
-
gerrit.wikimedia.org
/r/q/I7a59cc4c351b5aa47ed46f7a14a1105fd1ecc5b5
issue-tracking
Sources
- CVE List CVE-2026-58520
- NVD CVE-2026-58520
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