Cross Site Scripting (XSS) vulnerability in FusionPBX 4.5.7 allows remote malicious users to inject arbitrary web script or HTML via an unsanitized “f” variable in appvarsvars_textarea.php.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-21054
Reference (s):
- https://github.com/fusionpbx/fusionpbx/commit/2489004c7b7e0b14e21cd86cedaab87fed209415
- https://resp3ctblog.wordpress.com/2019/10/28/fusionpbx-xss-21/