Vulnerability Details CVE-2021-47870
GetSimple CMS My SMTP Contact Plugin 1.1.2 suffers from a Stored Cross-Site Scripting (XSS) vulnerability. The plugin attempts to sanitize user input using htmlspecialchars(), but this can be bypassed by passing dangerous characters as escaped hex bytes. This allows attackers to inject arbitrary client-side code that executes in the administrator's browser when visiting a malicious page.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 20.0%
CVSS Severity