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GHSA-33xw-x3pr-rvqj

HIGH

GHSA-33xw-x3pr-rvqj is a high-severity (CVSS 7.5) vulnerability in mediawiki/core. O3 Security confirms whether GHSA-33xw-x3pr-rvqj is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Wikimedia Potential DOS due to slow WatchedItemStore::countVisitingWatchersMultiple

Also known asCVE-2019-12473
Published
May 24, 2022
Updated
May 19, 2024
Affected
4 pkgs
Patched
4 / 4
Exploits
None indexed

Blast Radius

4 pkgs affected
🐘mediawiki/core🐘mediawiki/core🐘mediawiki/core🐘mediawiki/core

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Wikimedia MediaWiki 1.27.0 through 1.32.1 might allow DoS. Passing invalid titles to the API could cause a DoS by querying the entire watchlist table. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.

Affected Packages

4 total 4 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistmediawiki/core1.27.0&&< 1.27.61.27.6
🐘Packagistmediawiki/core1.30.0&&< 1.30.21.30.2
🐘Packagistmediawiki/core1.31.0&&< 1.31.21.31.2
🐘Packagistmediawiki/core1.32.0&&< 1.32.21.32.2

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for mediawiki/core. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update mediawiki/core to 1.27.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-33xw-x3pr-rvqj is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether GHSA-33xw-x3pr-rvqj is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-33xw-x3pr-rvqj. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

Wikimedia MediaWiki 1.27.0 through 1.32.1 might allow DoS. Passing invalid titles to the API could cause a DoS by querying the entire watchlist table. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.
O3 Security · Impact-Aware SCA

Is GHSA-33xw-x3pr-rvqj in your dependencies?

O3 detects GHSA-33xw-x3pr-rvqj across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.