CVE-2024-12878 PoC — Custom Block Builder – Lazy Blocks < 3.8.3 - Reflected XSS

Source

https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2024/CVE-2024-12878.yaml

Associated Vulnerability

Title:Custom Block Builder – Lazy Blocks < 3.8.3 - Reflected XSS (CVE-2024-12878)
Description:The Custom Block Builder WordPress plugin before 3.8.3 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin.

Description

Custom Block Builder WordPress plugin < 3.8.3 contains a reflected cross-site scripting caused by lack of sanitization and escaping of a parameter before output, letting attackers execute malicious scripts in high privilege users' browsers, exploit requires victim to load malicious page.

File Snapshot

Remarks

1. It is advised to access via the original source first.

2. Local POC snapshots are reserved for subscribers — if the original source is unavailable, the local mirror is part of the paid plan.

View subscription plans →