CVE-2024-8665 is a reflected Cross-Site Scripting vulnerability in the YITH Custom Login plugin for WordPress. The issue arises from the use of add_query_arg without proper escaping of URL parameters, allowing injection of malicious scripts. This affects all versions up to and including 1.7.3. An unauthenticated attacker can exploit this by tricking users into clicking crafted links, leading to script execution in the context of the affected site. The CVSS 3.1 score is 6.1 (medium), with attack vector network, low attack complexity, no privileges required, user interaction required, scope changed, and low impact on confidentiality and integrity.

Successful exploitation can lead to execution of arbitrary scripts in the context of the vulnerable website, potentially allowing attackers to steal user session data or perform actions on behalf of the user. The impact is limited to confidentiality and integrity with no impact on availability. 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 available, users should avoid clicking suspicious links related to the affected plugin and consider disabling or replacing the YITH Custom Login plugin if possible. Monitor official yithemes communications for updates on patches or mitigations.