CVE-2024-11376 is a reflected cross-site scripting vulnerability in the s2Member WordPress plugin (versions up to 241114). The issue arises from the use of the add_query_arg function without proper escaping of URL parameters, allowing injection of arbitrary web scripts. An unauthenticated attacker can exploit this by crafting a malicious URL that, when clicked by a user, executes injected scripts in the context of the affected site. This vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation). The CVSS 3.1 base score is 6.1, reflecting network attack vector, low attack complexity, no privileges required, user interaction needed, scope changed, and partial confidentiality and integrity impact.

Successful exploitation can lead to execution of arbitrary scripts in the victim's browser, potentially resulting in partial confidentiality and integrity loss such as theft of session tokens or manipulation of displayed content. There is no impact on availability. The vulnerability requires user interaction (clicking a malicious link) and does not require authentication.

No official patch or remediation is currently available for this vulnerability. Users should follow vendor advisories for updates. Until a fix is released, avoid clicking on suspicious links related to the affected plugin and consider implementing web application firewall rules to detect and block reflected XSS attempts targeting the plugin's URL parameters.