CVE-2025-12803

Bold Builder <= 5.5.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via bt_bb_tabs Shortcode

2026-02-06 17:29

Strategic Overview

Status: Patched in 5.5.4
Affected Plugin: Bold Page Builder
Affected Version: <= 5.5.3
CVSS: 6.4Medium
Weakness type: CWE-80 · Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CVE: CVE-2025-12803

View all Bold Page Builder vulnerabilities

At a glance

CVE-2025-12803 is a medium-severity Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in the Bold Page Builder WordPress plugin, affecting versions <= 5.5.3. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Contributor level or above. The issue is fixed in version 5.5.4; sites on affected versions should update now. Disclosed February 2026, reported by Muhammad Yudha - DJ.

Vulnerability Overview

The Bold Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin 'bt_bb_tabs' shortcode in all versions up to, and including, 5.5.3 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.

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.

Remediation

Update to version 5.5.4, or a newer patched version

How does WordSec protect against this?

An attacker needs Contributor access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Bold Page Builder 5.5.4 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2025-12803 https://www.wordfence.com/threat-intel/vulnerabilities/id/64f30329-ecf2-4e30-bc23-9d447e239e08 https://nvd.nist.gov/vuln/detail/CVE-2025-12803

Related records

Other vulnerabilities in Bold Page Builder

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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