CVE-2026-5721 is a stored cross-site scripting vulnerability in the wpDataTables WordPress plugin (versions up to 6.5.0.4). The flaw arises from inadequate sanitization and escaping in the prepareCellOutput() method of LinkWDTColumn, ImageWDTColumn, and EmailWDTColumn classes. This allows unauthenticated attackers to inject malicious scripts if they can convince an administrator to import attacker-controlled data containing payloads in affected column types. The vulnerability has a CVSS 3.1 base score of 4.7 (medium severity) with network attack vector, high attack complexity, no privileges required, user interaction required, and impacts confidentiality and integrity with no availability impact. No known exploits in the wild or vendor patches are currently documented.

Successful exploitation can lead to execution of arbitrary scripts in the context of the affected site, potentially compromising confidentiality and integrity of user data. The attack requires tricking an administrator to import malicious data, limiting the attack vector. There is no impact on availability. No known exploits are reported in the wild at this time.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, administrators should avoid importing data from untrusted sources, especially when using Link, Image, or Email column types in wpDataTables. Monitoring vendor channels for updates is recommended.