WPBakery Page Builder <= 8.6.1 - Stored Cross-Site Scripting via vc_custom_heading Shortcode

2025-10-14 17:32

Muhammad Yudha - DJ

Strategic Overview

Status

Patched in 8.7

Affected PluginWPBakery Page Builder

Affected Version<= 8.6.1

CVSS6.4Medium

CVECVE-2025-11161

View all WPBakery Page Builder vulnerabilities

Vulnerability Overview

The WPBakery Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the vc_custom_heading shortcode in all versions up to, and including, 8.6.1. This is due to insufficient restriction of allowed HTML tags and improper sanitization of user-supplied attributes in the font_container parameter. This makes it possible for authenticated attackers with contributor-level access or higher to inject arbitrary web scripts in posts that will execute whenever a user accesses an injected page via the vc_custom_heading shortcode with malicious tag and text attributes granted they have access to use WPBakery shortcodes.

Technical Analysis

REMEDIATION: Update to version 8.7, or a newer patched version --- IDENTIFIER: CWE-80 (Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)) The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as <, >, and & that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages.

External References

https://www.cve.org/CVERecord?id=CVE-2025-11161 https://www.wordfence.com/threat-intel/vulnerabilities/id/2772cade-c625-437a-b57b-ce8a2e3393bf

CVSS Vector

6.4

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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