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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.

PUBLISHED Reserved 2026-01-08 | Published 2026-02-14 | Updated 2026-02-17 | Assigner Wordfence




MEDIUM: 4.4CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Default status
unaffected

* (semver)
affected

Timeline

2026-02-13:Disclosed

Credits

Bhumividh Treloges finder

References

www.wordfence.com/...-20fb-4cef-bae7-2cd5fa038175?source=cve

plugins.trac.wordpress.org/...e-switch/trunk/uls-options.php

plugins.trac.wordpress.org/...ch/tags/1.6.10/uls-options.php

cve.org (CVE-2026-0735)

nvd.nist.gov (CVE-2026-0735)

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