Stored Cross-Site Scripting in FancyBox for WordPress Plugin
CVE-2025-3662

6.1MEDIUM

Key Information:

Vendor

WordPress
Status
Fancybox For WordPress
Vendor
CVE Published:
3 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-3662?

The FancyBox for WordPress plugin versions prior to 3.3.6 is vulnerable to an Unauthenticated Stored Cross-Site Scripting (XSS) flaw. This occurs due to the failure to properly escape captions and title attributes when they are utilized to populate the captions in galleries. Attackers can exploit this weakness to inject malicious scripts, compromising website integrity and user data. Website administrators are advised to update to the latest version to mitigate potential security risks.

Affected Version(s)

FancyBox for WordPress 0 < 3.3.6

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-3662 - Proof of Concept

References

https://wpscan.com/vulnerability/4cda12f0-3c23-44ad-80ea-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Pierre Rudloff
Marc Montpas
WPScan
.
CVE-2025-3662 : Stored Cross-Site Scripting in FancyBox for WordPress Plugin