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No exploitation reportedFix available

CVE-2019-16738

No exploitation reported by the sources we read.

  • Published2019-09-26
  • Fixed in1.33.1 · 1.32.4 · 1.31.4
  • WeaknessCWE-862

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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

Timeline

dates in UTC
  1. 2019-09-2602:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-16738?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-16738?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Mediawiki
BranchAffectedFixed in
1.33≥ 1.33.0, < 1.33.11.33.1
1.32≥ 1.32.0, < 1.32.41.32.4
1.31≥ 1.31.0, < 1.31.41.31.4
Debian debian linux
BranchAffectedFixed in
9.0= 9.0no fix published
10.0= 10.0no fix published
Fedoraproject fedora
BranchAffectedFixed in
30.x= 30no fix published
31.x= 31no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • mediawikiUbuntu:Pro:24.04:LTSall versions · no fixed version listed
  • mediawikiUbuntu:Pro:22.04:LTSall versions · no fixed version listed
  • mediawikiUbuntu:Pro:20.04:LTSall versions · no fixed version listed
  • mediawikiUbuntu:26.10all versions · no fixed version listed
  • mediawikiUbuntu:26.04:LTSall versions · no fixed version listed
  • mediawikiUbuntu:25.10all versions · no fixed version listed
  • mediawikiUbuntu:18.04:LTSall versions · no fixed version listed
  • mediawikiMageia:7all versions · fixed in 1.31.5-1.mga7

5 more package ranges on OSV.dev

Vendor advisories

  • CVE-2019-16738 Red Hat Product Security12 known affected

    mediawiki: suppressed username information disclosure via Special:Redirect

    mediawiki as a component of Red Hat OpenShift Container Platform 3.10 · mediawiki-doc as a component of Red Hat OpenShift Container Platform 3.10 · mediawiki.src as a component of Red Hat OpenShift Container Platform 3.10 · +9 more

Full record on NVD

Fix

  1. Update Mediawiki to 1.33.1 · 1.32.4 · 1.31.4
  2. No fix planned, says the vendor Red Hat Product Security CVE-2019-16738 · 6 productsOut of support scope
  3. No fix planned, says the vendor Red Hat Product Security CVE-2019-16738 · 6 productsWill not fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVSS 3.15.3read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • NVDweakness (CWE)CWE-862read 2026-10-23
  • FIRST EPSSEPSS score1.8 %2026-11-03
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryMODERATE2024-05-15

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Published
2019-09-26
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-7hwr-f745-5rwq

Frequently asked questions

What is CVE-2019-16738?

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

Is CVE-2019-16738 actively exploited?

Active exploitation of CVE-2019-16738 has not been confirmed. Its EPSS score was 1.8% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-16738?

CVE-2019-16738 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Running mediawiki? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

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Sources for this record