This vulnerability (CVE-2024-34566) in Johan van der Wijk's Content Blocks (Custom Post Widget) plugin allows stored cross-site scripting due to improper input sanitization during web page generation. An attacker with low privileges can inject malicious scripts that execute in the context of other users, potentially leading to confidentiality, integrity, and availability impacts. The CVSS 3.1 vector indicates network attack vector, low attack complexity, requiring privileges and user interaction, with impacts on confidentiality, integrity, and availability rated as low to low to low respectively. The vulnerability affects versions through 3.3.0. No patch or official remediation is currently documented.

Successful exploitation can lead to stored XSS attacks, allowing an attacker to execute arbitrary scripts in the context of other users, potentially compromising user data confidentiality, integrity, and availability. The CVSS score of 6.5 reflects a medium severity impact with possible limited but meaningful consequences. No known active exploitation has been reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider limiting privileges of users who can input data into the affected plugin and apply web application firewall (WAF) rules to detect or block XSS payloads targeting this plugin. Monitor vendor channels for updates and patches.