CVE-2026-15394
Received Received - Intake

Stored XSS in Header Footer Script Adder WordPress Plugin

Publication date: 2026-07-23

Last updated on: 2026-07-23

Assigner: Wordfence

Description
The Header Footer Script Adder – Insert Code in Header, Body & Footer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'asm_code' Snippet Meta in all versions up to, and including, 2.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-07-23
Last Modified
2026-07-23
Generated
2026-07-23
AI Q&A
2026-07-23
EPSS Evaluated
N/A
NVD
CVE-2026-15394
EUVD
EUVD-2026-47906

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
header_footer_script_adder header_footer_script_adder to 2.1 (inc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability is a Stored Cross-Site Scripting (XSS) issue in the Header Footer Script Adder WordPress plugin. It allows authenticated attackers with author-level access or higher to inject malicious scripts into web pages via the 'asm_code' parameter. The flaw exists due to insufficient input sanitization and output escaping in versions up to 2.1.

Detection Guidance

To detect this vulnerability, inspect WordPress sites using the Header Footer Script Adder plugin versions up to 2.1. Check for unauthorized JavaScript snippets in headers, footers, or body sections. Review user roles with author-level access or higher for suspicious activity.

Impact Analysis

If exploited, this vulnerability could allow attackers to inject malicious scripts into your WordPress site. These scripts could steal user data, hijack sessions, or deface pages. Users visiting infected pages may have their sessions compromised or be redirected to malicious sites.

Compliance Impact

This vulnerability could lead to data breaches, which may violate GDPR and HIPAA requirements for protecting user data. Non-compliance could result in legal penalties, fines, or reputational damage due to unauthorized data exposure or script execution.

Mitigation Strategies

Immediately update the Header Footer Script Adder plugin to the latest version. Remove any unauthorized code snippets from the plugin's settings. Restrict author-level and higher user roles to trusted personnel only.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-15394. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart