CVE-2026-6399

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.

Source: NVD

References

• [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-6399
• [Other]https://plugins.trac.wordpress.org/browser/general-options/tags/1.1.0/direct-action.php
• [Other]https://plugins.trac.wordpress.org/browser/general-options/tags/1.1.0/direct-main.php
• [Other]https://plugins.trac.wordpress.org/browser/general-options/trunk/direct-action.php
• [Other]https://plugins.trac.wordpress.org/browser/general-options/trunk/direct-main.php
• [Other]https://www.wordfence.com/threat-intel/vulnerabilities/id/d29c69bb-4feb-477e-b18f-934ece21aff6?source=cve

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