What’s Vulnerable › Vulnerabilities

CVE-2026-0735: User Language Switch <= 1.6.10 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'tab_color_picker_language_switch' Parameter

• Severity: medium (CVSS 4.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-14 · updated 2026-06-17
• Weakness: CWE-79

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.

Affected products

• webilop User Language Switch: through 1.6.10

References

• https://plugins.trac.wordpress.org/browser/user-language-switch/tags/1.6.10/uls-options.php#L365
• https://plugins.trac.wordpress.org/browser/user-language-switch/trunk/uls-options.php#L365
• https://www.wordfence.com/threat-intel/vulnerabilities/id/c6f61e13-20fb-4cef-bae7-2cd5fa038175?source=cve

Get alerted when CVE-2026-0735 or the next vulnerability affects your stack