Vulnerability in Wikimedia MediaWiki (CVE-2019-12474)

Summary

Vulnerability in Wikimedia MediaWiki (CVE-2019-12474). Confidential information can be exposed externally. Mitigation: upgrade to 1.32.2 or later.

Original description

The description as published by the source.

Wikimedia MediaWiki 1.23.0 through 1.32.1 has an information leak. Privileged API responses that include whether a recent change has been patrolled may be cached publicly. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.

Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2019-12474 has been found in Wikimedia MediaWiki.
Confidential information can be exposed externally.
What to do: upgrade Wikimedia MediaWiki to 1.32.2 or later.
If unsure, ask your IT team or search "Wikimedia MediaWiki CVE-2019-12474" on the vendor's site.

CVE-2019-12474 (Wikimedia MediaWiki)
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 1.32.2 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (unclassified) exists in Wikimedia MediaWiki.

📍 Affected scope

Check the vendor advisory for the affected versions of Wikimedia MediaWiki.

🔥 Severity

Severity: ?. Confidential information can be exposed externally.

🔧 How to fix

Update to 1.32.2.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

1
Identify exposure identify
```
Audit SBOM/dependencies for affected components.
```
資産台帳・SBOM・依存マニフェストで Wikimedia MediaWiki を使っているサービスとバージョンを洗い出す。
2
Apply patch patch
```
Upgrade Wikimedia MediaWiki to 1.32.2
```
ステージング環境で 1.32.2 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
3
Post-deployment verification verify
```
Confirm patched version is live in production
```
パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Fix status by distribution

Fixed packages published by each distribution for this CVE

Debian DEBIAN-CVE-2019-12474 mediawiki Fixed in: 1:1.31.2-1