CVE-2024-12878— Custom Block Builder – Lazy Blocks < 3.8.3 - Reflected XSS
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I. Basic Information for CVE-2024-12878
Vulnerability Information
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Vulnerability Title
Custom Block Builder – Lazy Blocks < 3.8.3 - Reflected XSS
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
WordPress plugin Custom Block Builder 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台支持在PHP和MySQL的服务器上架设个人博客网站。WordPress plugin是一个应用插件。 WordPress plugin Custom Block Builder 3.8.3之前版本存在安全漏洞，该漏洞源于对用户的清理和转义不足。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Unknown | Custom Block Builder | 0 ~ 3.8.3 | - |
II. Public POCs for CVE-2024-12878
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | 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. | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2024/CVE-2024-12878.yaml | POC Details |
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- Custom Block Builder – Lazy Blocks < 3.8.3 – Reflected XSS | CVE 2024-12878 | Plugin Vulnerabilitiesexploitvdb-entrytechnical-description
- https://nvd.nist.gov/vuln/detail/CVE-2024-12878
Same Patch Batch · Unknown · 2025-02-26 · 17 CVEs total
| CVE-2024-10152 | Simple Certain Time to Show Content < 1.3.1 - Reflected XSS | |
| CVE-2024-10483 | SimplePress Forum < 6.10.11 - Reflected XSS | |
| CVE-2024-10563 | WooCommerce Cart Count Shortcode < 1.1.0 - Contributor+ XSS | |
| CVE-2024-12737 | WP BASE Booking of Appointments, Services and Events < 5.0.0 - Reflected XSS | |
| CVE-2024-13571 | Post Timeline < 2.3.10 - Reflected XSS | |
| CVE-2024-13113 | Countdown Timer for Elementor < 1.3.7 - Contributor+ Stored XSS | |
| CVE-2024-13624 | WPMovieLibrary <= 2.1.4.8 - Reflected XSS | |
| CVE-2024-13628 | WP Pricing Table <= 1.1 - Reflected XSS | |
| CVE-2024-13632 | WP Extra Fields <= 1.0.1 - Reflected XSS | |
| CVE-2024-13631 | OM Stripe <= 02.00.00 - Reflected XSS | |
| CVE-2024-13630 | News List <= 1.0 - Reflected XSS | |
| CVE-2024-13629 | Pushbiz <= 1.0 - Reflected XSS | |
| CVE-2024-13634 | Post Sync <= 1.1 - Reflected XSS | |
| CVE-2024-13633 | Simple Catalogue <= 1.0.2 - Reflected XSS | |
| CVE-2024-13669 | CalendApp <= 1.1 - Reflected XSS | |
| CVE-2024-13678 | R3W Instafeed <= 1.0 - Reflected XSS |
IV. Related Vulnerabilities
Same vendor: Unknown
- CVE-2026-6433
Custom CSS JS PHP <= 2.0.7 - Unauthenticated SQL Injection t - CVE-2026-4935
SureTriggers < 1.1.23 – Unauthenticated SQLi - CVE-2026-5335
Magic Export & Import < 1.2.0 - Unauthenticated PII Disclosu - CVE-2026-5337
Frontend File Manager Plugin <= 23.6 - Subscriber+ Arbitrary - CVE-2026-5306
Check & Log Email < 2.0.13 - Unauthenticated Stored XSS
V. Comments for CVE-2024-12878
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