Stored Cross-Site Scripting Vulnerability in Simple Lightbox Plugin by WordPress
CVE-2025-3516

5.9MEDIUM

Key Information:

Vendor

WordPress
Status
Simple Lightbox
Vendor
CVE Published:
16 May 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-3516?

The Simple Lightbox plugin for WordPress, prior to version 2.9.4, exposes a security flaw where it fails to adequately validate and escape certain attributes before rendering them on pages or posts. This vulnerability allows users with contributor roles or higher to execute Stored Cross-Site Scripting (XSS) attacks, potentially leading to unauthorized data manipulation and site compromise. It is crucial for site administrators to update the plugin to the latest version to mitigate the risks associated with this vulnerability.

Affected Version(s)

Simple Lightbox 0 < 2.9.4

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-2025-3516 - Proof of Concept

References

https://wpscan.com/vulnerability/336a78cd-297b-4f47-a007-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
5.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
Required
Scope:
Changed

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Pierre Rudloff
WPScan
.