CVE-2024-1840 is a stored cross-site scripting vulnerability in the WPBakery Page Builder WordPress plugin affecting all versions up to 7.5. The vulnerability is due to improper neutralization of input in the Post Author tag attribute, allowing authenticated users with contributor or higher privileges to inject arbitrary web scripts. These scripts execute in the context of users viewing the compromised pages, potentially leading to information disclosure or session hijacking. The CVSS 3.1 base score is 6.4, reflecting network attack vector, low attack complexity, required privileges at the contributor level, no user interaction, and impacts on confidentiality and integrity but not availability.

An authenticated attacker with contributor or higher privileges can inject malicious scripts into pages via the Post Author tag attribute. These scripts execute in the browsers of users who view the affected pages, potentially leading to unauthorized actions such as data theft or session hijacking. The vulnerability does not impact availability. 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, restrict contributor-level access to trusted users only and consider additional input validation or output escaping controls if possible. Monitor official WPBakery and WordPress security channels for updates.