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[20210701] - Core - XSS in JForm Rules field

  • Project: Joomla!
  • SubProject: CMS
  • Impact: Low
  • Severity: Low
  • Versions: 3.0.0 - 3.9.27
  • Exploit type: XSS
  • Reported Date: 2021-05-29
  • Fixed Date: 2021-07-06
  • CVE Number: CVE-2021-26035

Description

Inadequate escaping in the Rules field of the JForm API leads to a XSS vulnerability.

Affected Installs

Joomla! CMS versions 3.0.0 - 3.9.27

Solution

Upgrade to version 3.9.28

Contact

The JSST at the Joomla! Security Centre.

Reported By: Hoang Nguyen