# CVE-2019-12473: Wikimedia Potential DOS due to slow WatchedItemStore::countVisitingWatchersMultiple

Source: https://junglewise.ai/threats/cve-2019-12473-wikimedia-potential-dos-due-to-slow-watcheditemstore  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-05-24  
License: CC BY 4.0 with a link back

CVE-2019-12473 · Severity: low · CVSS 3 · Published 2022-05-24

Wikimedia Potential DOS due to slow WatchedItemStore::countVisitingWatchersMultiple

Technologies: [mediawiki/core (Packagist)](https://junglewise.ai/threats/technologies/mediawiki-core). Vendors: [Packagist](https://junglewise.ai/threats/vendors/packagist).

## Quick answers

**Is CVE-2019-12473 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2019-12473 being exploited in the wild.

**How severe is CVE-2019-12473?** Low severity, with a CVSS score of 3, published 24 May 2022.

**Which products and versions are affected?** mediawiki/core (Packagist) ECOSYSTEM:introduced=1.27.0,fixed=1.27.6.

**Is there a fix for CVE-2019-12473?** Yes. mediawiki/core (Packagist): upgrade to 1.27.6 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2019-12473?** Check whether you run mediawiki/core (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- mediawiki/core (Packagist): upgrade to 1.27.6 or later

  ```sh
  composer require mediawiki/core:^1.27.6
  ```


## Affected products

- mediawiki/core (Packagist) ECOSYSTEM:introduced=1.27.0,fixed=1.27.6

## Identifiers

- CVE-2019-12473
- GHSA-33xw-x3pr-rvqj

## Related threats

- [MediaWiki Denial of Service vulnerability](https://junglewise.ai/threats/cve-2023-45363-mediawiki-denial-of-service-vulnerability)
- [X-Forwarded-For header allows brute-forcing autoblocked IP addresses](https://junglewise.ai/threats/cve-2023-29141-x-forwarded-for-header-allows-brute-forcing-autoblocked-ip)
- [MediaWiki allows a denial of service](https://junglewise.ai/threats/cve-2021-41800-mediawiki-allows-a-denial-of-service)
- [OATHAuth extension in MediaWiki is not implementing rate limit](https://junglewise.ai/threats/cve-2020-25827-oathauth-extension-in-mediawiki-is-not-implementing-rate-limit)
- [MediaWiki Special:UserRights exposes the existence of hidden users](https://junglewise.ai/threats/cve-2020-25813-mediawiki-special-userrights-exposes-the-existence-of-hidden)