The Hostel plugin for WordPress (prasunsen project) suffers from a reflected cross-site scripting vulnerability (CWE-79) due to improper neutralization of input during web page generation. Specifically, the 'shortcode_id' parameter is not adequately sanitized or escaped before being included in page output, enabling attackers to inject malicious scripts. This affects all plugin versions up to 1.1.6. The vulnerability allows unauthenticated attackers to craft URLs that, when clicked by users, execute arbitrary JavaScript in the context of the affected site. The CVSS 3.1 base score is 6.1, reflecting network attack vector, low attack complexity, no privileges required, user interaction needed, and impacts on confidentiality and integrity but not availability. No vendor advisory or patch is currently available, and no known exploits have been reported.

Successful exploitation can lead to execution of arbitrary scripts in the context of the affected website, potentially allowing attackers to steal user credentials, perform actions on behalf of users, or manipulate site content. The impact is limited to confidentiality and integrity, with no direct availability impact. The vulnerability requires user interaction (clicking a malicious link) and does not require authentication.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider implementing web application firewall (WAF) rules to detect and block malicious input targeting the 'shortcode_id' parameter. Additionally, educate users to avoid clicking suspicious links. Monitor for vendor updates regarding patches or official mitigations.