CVE-2026-1569 is a stored cross-site scripting vulnerability in the Wueen plugin for WordPress, affecting all versions up to and including 0.2.0. The issue stems from improper neutralization of input in the wueen-blocket shortcode, where user-supplied attributes are not adequately sanitized or escaped. Authenticated attackers with contributor-level privileges or higher can exploit this to inject arbitrary JavaScript that executes in the context of users visiting the compromised pages. The vulnerability has a CVSS 3.1 base score of 6.4, reflecting network attack vector, low attack complexity, required privileges, no user interaction, and impacts on confidentiality and integrity but not availability.

An attacker with contributor-level access or higher can inject persistent malicious scripts into pages via the vulnerable shortcode. This can lead to unauthorized actions performed in the context of other users viewing the infected pages, potentially compromising user data confidentiality and integrity. There is no impact on system availability. No known exploitation in the wild has been reported to date.

No official patch or fix is currently available for this vulnerability. Users should monitor the vendor's advisory channels for updates. Until a fix is released, restrict contributor-level access to trusted users only and consider disabling or removing the Wueen plugin if possible to prevent exploitation.