prasunsen Hostel Plugin up to 1.1.7 on WordPress Shortcode wphostel-book text cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, has been found in prasunsen Hostel Plugin up to 1.1.7. Affected by this issue is the function wphostel-book of the component Shortcode Handler. This manipulation of the argument text causes cross site scripting. This vulnerability is registered as CVE-2026-3907. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability has been found in prasunsen Hostel Plugin up to 1.1.7 and classified as problematic. Affected by this vulnerability is the function wphostel-book of the component Shortcode Handler. The manipulation of the argument text with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

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.

It is possible to read the advisory at wordfence.com. This vulnerability is known as CVE-2026-3907 since 03/10/2026. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• WordPress Plugin

Vendor

• prasunsen

Name

• Hostel Plugin

Version

• 1.1.0
• 1.1.1
• 1.1.2
• 1.1.3
• 1.1.4
• 1.1.5
• 1.1.6
• 1.1.7

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