CVE-2024-13587 is a stored cross-site scripting vulnerability (CWE-79) in the Zigaform – Price Calculator & Cost Estimation Form Builder Lite WordPress plugin. The issue exists in all versions up to and including 7.4.7 due to improper neutralization of input during web page generation, specifically in the 'zgfm_fvar' shortcode. Authenticated attackers with contributor-level privileges or higher can inject arbitrary web scripts that execute when users access the compromised page. This vulnerability can lead to the execution of malicious scripts in the context of the affected site, potentially impacting confidentiality and integrity of user interactions. The CVSS v3.1 base score is 6.4 (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N), reflecting network attack vector, low attack complexity, required privileges, no user interaction, scope change, and limited confidentiality and integrity impact without availability impact.

Successful exploitation allows authenticated users with contributor-level access or above to inject and execute arbitrary scripts in the context of the vulnerable WordPress site. This can lead to partial compromise of user data confidentiality and integrity. The vulnerability does not impact availability. There are no known exploits in the wild as of the published date.

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 disabling or removing the vulnerable plugin if feasible. Monitor for updates from the vendor or plugin maintainers regarding patches or official mitigations.