How to fix CVE-2025-3516?

Within 30 days: Identify affected systems running before 2.9.4 does not validate and escape some of its attrib and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Is Simple Lightbox affected by CVE-2025-3516?

Organizations using before 2.9.4 does not validate and escape some of its attributes should be aware of moderate risk from CVE-2025-3516, a cross-site scripting vulnerability rated CVSS 5.9. Attackers could inject scripts to steal sessions or perform actions as authenticated users.

CVE-2025-3516

MEDIUM

2025-05-16 [email protected]

WordPress XSS Simple Lightbox PHP

5.9

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:42 vuln.today

PoC Detected

May 22, 2025 - 17:03 vuln.today

Public exploit code

CVE Published

May 16, 2025 - 06:15 nvd

MEDIUM 5.9

DescriptionNVD

AnalysisAI

The Simple Lightbox WordPress plugin before 2.9.4 does not validate and escape some of its attributes before outputting them back in a page/post, which could allow users with the contributor role and. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. The Simple Lightbox WordPress plugin before 2.9.4 does not validate and escape some of its attributes before outputting them back in a page/post, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks. Affected products include: Archetyped Simple Lightbox. Version information: before 2.9.4.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.

CVE-2025-3516 vulnerability details – vuln.today

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