Monitor vulnerabilities like this one.
Sign up free to get alerted when software you use is affected.
4.4
WordPress User Language Switch Plugin Allows Attackers to Inject Malicious Code
CVE-2026-0735
Summary
The User Language Switch plugin for WordPress has a security flaw that lets attackers with administrator access inject malicious code into pages. This only affects WordPress sites with multiple languages enabled and where certain security settings are turned off. Update to the latest version of the plugin to fix the issue.
Original title
The User Language Switch plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'tab_color_picker_language_switch' parameter in all versions up to, and including, 1.6.10 due to i...
Original description
The User Language Switch plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'tab_color_picker_language_switch' parameter in all versions up to, and including, 1.6.10 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
nvd CVSS3.1
4.4
Vulnerability type
CWE-79
Cross-site Scripting (XSS)
Published: 14 Feb 2026 · Updated: 10 Mar 2026 · First seen: 6 Mar 2026