Description
Joomla! Core is prone to a vulnerability that lets remote attackers inject arbitrary formulas into CSV files. Attackers can possibly exploit this issue to execute arbitrary commands on the victim's system, by the use of Microsoft Excel DDE function, or to leak data via maliciously injected hyperlinks. Joomla! Core versions 3.9.x ranging from 3.9.0 and up to and including 3.9.6 are vulnerable.
Remediation
Update to Joomla! Core version 3.9.7 or latest
References
Related Vulnerabilities
YOURLS Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2011-3824)
Ruby Improper Control of Generation of Code ('Code Injection') Vulnerability (CVE-2019-16255)
WordPress Plugin Profile Builder-User Profile & User Registration Forms Security Bypass (3.1.0)
WordPress Plugin Duplicate Page and Post SQL Injection (2.5.6)