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Medium · 4.4 CVE-2026-0735 EUVD-2026-6048GHSA-r8hc-3q2v-m9fj

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

Published Feb 14, 2026 · Updated Apr 8, 2026 · Assigned by Wordfence

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

VendorProductAffectedFixed
webilop User Language Switch ≤ 1.6.10 —

References