CVE-2026-3907
Hostel <= 1.1.7 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'wphostel-book' Shortcode
Description
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.
INFO
Published Date :
July 10, 2026, 9:16 a.m.
Last Modified :
July 10, 2026, 9:16 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-3907
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the Hostel plugin to a newer version.
- Ensure user input is properly sanitized.
- Escape output attributes and content.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-3907.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-3907 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-3907
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-3907 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-3907 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Jul. 10, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'prasunsen', 'product': 'Hostel', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'semver', 'lessThanOrEqual': '1.1.7'}], 'defaultStatus': 'unaffected'}] Added Description 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N Added CWE CWE-79 Added Reference https://plugins.trac.wordpress.org/browser/hostel/tags/1.1.6/controllers/shortcodes.php#L79 Added Reference https://plugins.trac.wordpress.org/browser/hostel/tags/1.1.6/controllers/shortcodes.php#L91 Added Reference https://plugins.trac.wordpress.org/browser/hostel/tags/1.1.6/models/hostel.php#L195 Added Reference https://plugins.trac.wordpress.org/browser/hostel/trunk/controllers/shortcodes.php#L79 Added Reference https://plugins.trac.wordpress.org/browser/hostel/trunk/controllers/shortcodes.php#L91 Added Reference https://plugins.trac.wordpress.org/browser/hostel/trunk/models/hostel.php#L195 Added Reference https://plugins.trac.wordpress.org/changeset?reponame=&old=3480942%40hostel&new=3480942%40hostel Added Reference https://www.wordfence.com/threat-intel/vulnerabilities/id/30339c0d-6632-4073-b4d5-3bb4a5b8a58d?source=cve