[20201105] – Core – User Enumeration in backend login

  • Project: Joomla!
  • SubProject: CMS
  • Impact: Low
  • Severity: Low
  • Versions: 3.9.0-3.9.22
  • Exploit type: User Enumeration
  • Reported Date: 2020-08-15
  • Fixed Date: 2020-11-24
  • CVE Number: CVE-2020-xxx (TBA)

Description

Improper handling of the username leads to a user enumeration attack vector in the backend login page.

Affected Installs

Joomla! CMS versions 3.9.0 - 3.9.22

Solution

Upgrade to version 3.9.23

Contact

The JSST at the Joomla! Security Centre.

Reported By:  Phil Taylor

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