The Optimole – Optimize Images in Real Time WordPress plugin versions up to 4.2.3 contain a reflected XSS vulnerability due to improper output escaping of user-supplied URL paths in the get_current_url() function. These paths are inserted into JavaScript code via str_replace() in the replace_content() function without proper JavaScript context escaping. This flaw enables unauthenticated attackers to inject malicious scripts that execute in the context of users who click on crafted links, potentially leading to information disclosure or session hijacking. The vulnerability is tracked as CVE-2026-5226 with a CVSS 3.1 base score of 6.1 (medium severity). No vendor advisory or patch is currently available, and no exploits have been reported in the wild.

Successful exploitation allows unauthenticated attackers to execute arbitrary JavaScript in the context of users visiting affected pages, potentially leading to information disclosure or user session compromise. The impact is limited to confidentiality and integrity, with no direct availability impact reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider implementing temporary mitigations such as disabling the plugin or restricting access to affected pages. Avoid clicking on suspicious links that could exploit this vulnerability.