CVE-2025-39539 is a reflected cross-site scripting vulnerability in brewlabs WP Email Delivery plugin for WordPress, present in versions up to 1.20.11.23. The vulnerability results from improper neutralization of input during web page generation, enabling attackers to inject malicious scripts that execute in users' browsers when they interact with crafted links or inputs. The CVSS 3.1 score of 7.1 reflects a high-severity issue exploitable remotely without privileges but requiring user interaction. No patch or vendor advisory 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 a victim's browser, potentially leading to information disclosure, session hijacking, or other client-side impacts. The vulnerability affects confidentiality, integrity, and availability to a limited extent as indicated by the CVSS vector. There are no reports of active exploitation in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider disabling or restricting access to the affected plugin to reduce exposure. Monitor vendor channels for updates and apply patches promptly once available.