CVE-2026-3347
Stored XSS in Multi Functional Flexi Lightbox WordPress Plugin
Publication date: 2026-03-21
Last updated on: 2026-03-21
Assigner: Wordfence
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| arv | multi_functional_flexi_lightbox | to 1.2 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
The Multi Functional Flexi Lightbox plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in all versions up to and including 1.2. This vulnerability arises because the plugin does not properly sanitize or escape user input in the `arv_lb[message]` parameter. Specifically, the sanitize callback `arv_lb_options_val()` returns user input without sanitization, and the stored message is output in the `genLB()` function without escaping. As a result, an authenticated attacker with Administrator-level access can inject malicious scripts that execute whenever a user views a page or post with the lightbox enabled.
How can this vulnerability impact me? :
This vulnerability can allow an attacker with Administrator privileges to inject arbitrary web scripts into pages or posts that use the lightbox feature. These scripts will execute in the browsers of users who visit those pages, potentially leading to theft of sensitive information, session hijacking, or other malicious actions. Since the attack requires Administrator-level access, it could be used to escalate damage within a compromised WordPress site.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know