CVE-2026-6399
Deferred Deferred - Pending Action
Stored XSS in General Options WordPress Plugin

Publication date: 2026-05-20

Last updated on: 2026-05-20

Assigner: Wordfence

Description
The General Options plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to and including 1.1.0. This is due to the use of sanitize_text_field() for output escaping in the Contact Number (ad_contact_number) field — a function that strips HTML tags but does not encode double-quote characters to their HTML entity equivalent ("). When the stored value is echoed inside a double-quoted HTML attribute (value="..."), an attacker-supplied double-quote character breaks out of the attribute context. Even with WordPress's wp_magic_quotes mechanism (which prefixes quotes with a backslash), the resulting \" sequence is NOT treated as an escaped quote by HTML parsers — the backslash is rendered as a literal character and the bare double-quote still closes the attribute. This makes it possible for authenticated attackers with Administrator-level access and above to inject arbitrary web scripts in the admin settings page that will execute whenever any administrator visits the General Options settings page.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-05-20
Last Modified
2026-05-20
Generated
2026-06-10
AI Q&A
2026-05-20
EPSS Evaluated
2026-06-08
NVD
CVE-2026-6399
EUVD
EUVD-2026-31040
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
wordfence general_options_plugin to 1.1.0 (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

The General Options plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in versions up to and including 1.1.0. This occurs because the plugin uses the sanitize_text_field() function to escape output in the Contact Number field, which removes HTML tags but does not encode double-quote characters. When an attacker includes a double-quote in this field, it breaks out of the HTML attribute context, allowing injection of arbitrary web scripts. Even WordPress's wp_magic_quotes mechanism does not prevent this because the backslash used is rendered literally, not as an escape character. As a result, authenticated users with Administrator-level access can inject malicious scripts that execute whenever an administrator visits the General Options settings page.

Impact Analysis

This vulnerability allows attackers with Administrator-level access to inject and execute arbitrary JavaScript code within the WordPress admin settings page. This can lead to unauthorized actions such as stealing administrator session cookies, performing actions on behalf of administrators, or defacing the admin interface. Since the malicious script executes in the context of the administrator's browser, it can compromise the security and integrity of the WordPress site.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-6399. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart