The harry005 Ajax Custom CSS/JS plugin versions up to 2.0.4 contain a reflected cross-site scripting vulnerability caused by improper input neutralization during web page generation. This allows attackers to inject malicious scripts that are reflected in the web page output, potentially impacting users who visit crafted URLs or interact with vulnerable functionality. No CVSS score or vendor patch information is currently available, and no known exploits have been reported.

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary scripts in the context of the victim's browser, potentially leading to session hijacking, defacement, or other client-side attacks. Since the vulnerability is reflected XSS, the attacker typically needs to trick a user into clicking a malicious link or submitting crafted input. There is no indication of server-side compromise or data breach from the provided information.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider applying input validation or output encoding workarounds if feasible. Monitoring vendor channels for updates is recommended. No vendor advisory or patch links are currently provided.