PT-2026-4606 · WordPress · Responsive Header

Bhumividh Treloges · Published 2026-01-24 · Updated 2026-01-24 · CVE-2026-1300

Positive Technologies (AI Summary)

CVSS v3.1

4.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Responsive Header plugin for WordPress versions prior to 1.1

Description The software is susceptible to Stored Cross-Site Scripting through multiple plugin settings parameters due to inadequate input sanitization and output escaping. This allows authenticated attackers with administrator-level access or higher to inject arbitrary web scripts into pages. These scripts will execute when a user accesses the injected page. This issue only impacts multi-site installations and those where unfiltered html has been disabled.

Recommendations Update the Responsive Header plugin to version 1.1 or later.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-1300

Affected Products

Responsive Header

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-1300 · Security Note
• https://t.me/CVEtracker/42940 · Telegram Post
• https://wordfence.com/threat-intel/vulnerabilities/id/30821418-48c0-4bc6-8bf1-f558671bff24?source=cve · Note
• https://plugins.trac.wordpress.org/browser/responsive-header/tags/1.0/rhp-settings.php#L103 · Note
• https://twitter.com/VulmonFeeds/status/2015052545425629332 · Twitter Post
• https://twitter.com/CVEnew/status/2014995758525919279 · Twitter Post
• https://downloads.wordpress.org/plugin/responsive-header.1.0.zip · Note
• https://plugins.trac.wordpress.org/browser/responsive-header/trunk/rhp-settings.php#L103 · Note
• https://wordpress.org/plugins/responsive-header · Note