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TI-2019-12527 Aliases CVE-2019-16738GHSA-7hwr-f745-5rwq

In MediaWiki through 1.33.0, Special:Redirect allows information disclosure of suppressed…

Priority LOW 28CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass, Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Partial Red Hat: 4 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-862 and CWE-200.

Summary

In MediaWiki through 1.33.0, Special:Redirect allows information disclosure of suppressed usernames via a User ID Lookup.

Why it matters now

EPSS 0.01768 78th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial mediawiki/core (Packagist): 1.31.4, 1.32.4, 1.33.1Red Hat: 4 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—mediawiki/core (Packagist)1.31.0 to before 1.31.41.31.4Patch availableGHSA-7hwr-f745-5rwq
—mediawiki/core (Packagist)1.32.0 to before 1.32.41.32.4Patch availableGHSA-7hwr-f745-5rwq
—mediawiki/core (Packagist)1.33.0 to before 1.33.11.33.1Patch availableGHSA-7hwr-f745-5rwq
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • mediawiki/core (Packagist) Vendor— Affected 1.31.0 to before 1.31.4 Fixed in 1.31.4 Patch available GHSA-7hwr-f745-5rwq
  • mediawiki/core (Packagist) Vendor— Affected 1.32.0 to before 1.32.4 Fixed in 1.32.4 Patch available GHSA-7hwr-f745-5rwq
  • mediawiki/core (Packagist) Vendor— Affected 1.33.0 to before 1.33.1 Fixed in 1.33.1 Patch available GHSA-7hwr-f745-5rwq

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*1.31.0 to before 1.31.4; 1.32.0 to before 1.32.4; 1.33.0 to before 1.33.1Vulnerablemediawiki
cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*30VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*31VulnerableFedoraproject
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
  • cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:* Versions 1.31.0 to before 1.31.4; 1.32.0 to before 1.32.4; 1.33.0 to before 1.33.1 Vulnerable ·mediawiki
  • cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* Versions 30 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian

Remediation

  • Fix · GHSA-7hwr-f745-5rwq mediawiki/core (Packagist) Fixed in 1.31.4 Advisory →
  • Fix · GHSA-7hwr-f745-5rwq mediawiki/core (Packagist) Fixed in 1.32.4 Advisory →
  • Fix · GHSA-7hwr-f745-5rwq mediawiki/core (Packagist) Fixed in 1.33.1 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenShift Container Platform 3.10AffectedNo fix planned: Out of support scope
Red Hat OpenShift Container Platform 3.11AffectedNo fix planned: Will not fix
Red Hat OpenShift Container Platform 3.9AffectedNo fix planned: Out of support scope
Red Hat OpenShift Container Platform 4AffectedNo fix planned: Will not fix

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-16738
  2. 2026-10-03 Alias added: GHSA-7hwr-f745-5rwq

References

Exploit 1

Advisory 5

Other 6

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences