CVE-2026-1645: Hostel <= 1.1.8 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'custom_currency' Parameter and Localization file URL Setting
The Hostel plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'customcurrency' parameter and the 'localeurl' setting in all versions up to, and including, 1.1.8 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Administrator-level access, 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 unfilteredhtml has been disabled.
Affected Software
Event History
Frequently Asked Questions
Which WordPress deployments are affected?
The issue affects WordPress multisite installations and installations where unfiltered_html has been disabled. It does not apply to other installations according to the available data.
What access does an attacker need?
An attacker must already be authenticated with Administrator-level access or higher. Exploitation involves supplying script content through the custom_currency parameter or the locale_url localization setting.
When does the injected script execute?
The stored script executes when a user accesses a page where the malicious content was injected. The vulnerability can expose or modify content in that user’s browser context.