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CVE-2026-3907— Hostel <= 1.1.7 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'wphostel-book' Shortcode

CVSS 6.4 · Medium EPSS 0.21% · P11

Affected Version Matrix 1

VendorProductVersion RangeStatus
prasunsenHostel≤ 1.1.7affected
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I. Basic Information for CVE-2026-3907

Vulnerability Information
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Vulnerability Title
Hostel <= 1.1.7 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'wphostel-book' Shortcode
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
prasunsenHostel 0 ~ 1.1.7 -

II. Public POCs for CVE-2026-3907

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III. Intelligence Information for CVE-2026-3907

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Patches & Fixes for CVE-2026-3907 (4)

Vendor Advisories for CVE-2026-3907 (1)

IV. Related Vulnerabilities

Same product: Hostel
Same vendor: prasunsen
Same weakness: CWE-79

V. Comments for CVE-2026-3907

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