PT-2026-57121 · Prasunsen · Hostel

Published 2026-07-10 · Updated 2026-07-10 · CVE-2026-3907

NVD

CVSS v3.1

6.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

The Hostel plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'wphostel-book' shortcode in all versions up to and including 1.1.7. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes. Specifically, the second shortcode attribute (used as button text) is passed to the $text variable without sanitization at line 79 and then output directly into an HTML value attribute at line 91 without esc attr() or any other escaping. 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.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-3907

Affected Products

Hostel

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-3907 · Security Note
• https://plugins.trac.wordpress.org/browser/hostel/tags/1.1.6/controllers/shortcodes.php#L91 · Note
• https://plugins.trac.wordpress.org/changeset?reponame=&old=3480942%40hostel&new=3480942%40hostel · Note
• https://plugins.trac.wordpress.org/browser/hostel/tags/1.1.6/models/hostel.php#L195 · Note
• https://plugins.trac.wordpress.org/browser/hostel/trunk/controllers/shortcodes.php#L91 · Note
• https://wordfence.com/threat-intel/vulnerabilities/id/30339c0d-6632-4073-b4d5-3bb4a5b8a58d?source=cve · Note
• https://plugins.trac.wordpress.org/browser/hostel/trunk/models/hostel.php#L195 · Note
• https://plugins.trac.wordpress.org/browser/hostel/tags/1.1.6/controllers/shortcodes.php#L79 · Note
• https://plugins.trac.wordpress.org/browser/hostel/trunk/controllers/shortcodes.php#L79 · Note