CVE-2026-84819 is an unauthenticated cross-site scripting (XSS) vulnerability in WPAdverts versions up to and including 2.3.3. The flaw stems from improper neutralization of input during web page generation, allowing attackers to inject malicious scripts. The CVSS 3.1 base score is 7.1, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, and impacts to confidentiality, integrity, and availability. No known exploits in the wild or vendor patch information is provided in the input data.

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary scripts in the context of the affected site, potentially leading to data disclosure, modification, or denial of service. The vulnerability affects confidentiality, integrity, and availability as indicated by the CVSS vector.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider applying temporary mitigations such as input validation or disabling vulnerable features if possible.