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

Severity: low (CVSS 3.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-05-13 · updated 2026-06-17
Weakness: CWE-204

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.

Affected products

typo3: 10.4.0, 10.4.1

References

https://github.com/TYPO3/typo3/commit/14929b98ecda0ce67329b0f25ca7c01ee85df574
https://github.com/TYPO3/typo3/security/advisories/GHSA-347x-877p-hcwx
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-347x-877p-hcwx

Get alerted when CVE-2020-11063 or the next vulnerability affects your stack