Reflected XSS in Shield Security WordPress Plugin message Parameter
The Shield Security plugin for WordPress is vulnerable to reflected cross-site scripting (XSS) via the 'message' parameter in all versions up to and including 21.0.8. The issue is caused by insufficient input sanitization and output escaping of attacker-controlled input before it is reflected into a web page. An unauthenticated attacker can craft a malicious request or link containing arbitrary script payloads in the 'message' parameter; if a victim visits the crafted URL or otherwise triggers the affected page, the injected script executes in the victim’s browser within the security context of the target WordPress site.
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