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6.4
UpMenu plugin for WordPress allows hackers to inject malicious code
CVE-2026-1910
Summary
The UpMenu plugin for WordPress has a security flaw that lets authenticated users with contributor-level access or higher inject malicious code into web pages. This can happen when users access certain pages. To fix the issue, update to the latest version of the plugin.
Original title
The UpMenu – Online ordering for restaurants plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'lang' attribute of the 'upmenu-menu' shortcode in all versions up to, and inc...
Original description
The UpMenu – Online ordering for restaurants plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'lang' attribute of the 'upmenu-menu' shortcode in all versions up to, and including, 3.1. This is due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
nvd CVSS3.1
6.4
Vulnerability type
CWE-79
Cross-site Scripting (XSS)
Published: 14 Feb 2026 · Updated: 10 Mar 2026 · First seen: 6 Mar 2026