Description
The Multi Functional Flexi Lightbox plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `arv_lb[message]` parameter in all versions up to, and including, 1.2 due to insufficient input sanitization and output escaping. This is due to the `arv_lb_options_val()` sanitize callback returning user input without any sanitization, and the stored `message` value being output in the `genLB()` function without escaping. This makes it possible for authenticated attackers, with Administrator-level access, to inject arbitrary web scripts in pages that will execute whenever a user accesses a page or post with the lightbox enabled.
Published: 2026-03-21
Score: 5.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Stored Cross‑Site Scripting via the plugin's message parameter
Action: Immediate Patch
AI Analysis

Impact

The vulnerability allows an administrator to inject arbitrary JavaScript into the message field of the Multi Functional Flexi Lightbox plugin. When a page or post includes the lightbox, the unsanitized message is rendered, causing the injected script to execute in visitors' browsers. This can lead to credential theft, session hijacking, defacement, or other malicious actions against users of the affected WordPress site.

Affected Systems

The issue affects all installations of the arevico Multi Functional Flexi Lightbox WordPress plugin with version 1.2 or earlier. Any site that has installed or enabled this plugin is susceptible until it is updated or removed.

Risk and Exploitability

The CVSS base score of 5.5 indicates moderate severity, and the vulnerability is not listed in the KEV catalog. Exploitation requires authenticated Administrator access to the WordPress dashboard, so the attack vector is mainly local, but once scripted code is stored it can propagate to all visitors of lightbox pages. Because the exploit can be performed by site admins, the risk to site owners and their users is significant, especially for sites with sensitive information or high traffic.

Generated by OpenCVE AI on March 21, 2026 at 07:13 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Update the Multi Functional Flexi Lightbox plugin to a version newer than 1.2 where the message parameter is properly sanitized and escaped.
  • If an update cannot be applied immediately, disable the plugin or remove the lightbox functionality from public pages to prevent script execution.
  • Verify that no malicious code remains in the message field by inspecting stored options or using a search for common XSS payloads.
  • Implement a Content Security Policy (CSP) that restricts script execution to trusted sources to mitigate potential future XSS attacks.
  • Monitor site logs for unusual activity following the remediation to ensure no residual impact.

Generated by OpenCVE AI on March 21, 2026 at 07:13 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Tue, 24 Mar 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 23 Mar 2026 10:00:00 +0000

Type Values Removed Values Added
First Time appeared Arevico
Arevico multi Functional Flexi Lightbox
Wordpress
Wordpress wordpress
Vendors & Products Arevico
Arevico multi Functional Flexi Lightbox
Wordpress
Wordpress wordpress

Sat, 21 Mar 2026 05:30:00 +0000

Type Values Removed Values Added
Description The Multi Functional Flexi Lightbox plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `arv_lb[message]` parameter in all versions up to, and including, 1.2 due to insufficient input sanitization and output escaping. This is due to the `arv_lb_options_val()` sanitize callback returning user input without any sanitization, and the stored `message` value being output in the `genLB()` function without escaping. This makes it possible for authenticated attackers, with Administrator-level access, to inject arbitrary web scripts in pages that will execute whenever a user accesses a page or post with the lightbox enabled.
Title Multi Functional Flexi Lightbox <= 1.2 - Authenticated (Admin+) Stored Cross-Site Scripting via 'message' Parameter
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N'}

Subscriptions

Arevico Multi Functional Flexi Lightbox
Wordpress Wordpress
cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published:

Updated: 2026-04-08T17:13:08.284Z

Reserved: 2026-02-27T16:20:45.950Z

Link: CVE-2026-3347

cve-icon Vulnrichment

Updated: 2026-03-24T13:54:53.496Z

cve-icon NVD

Status : Deferred

Published: 2026-03-21T04:17:21.730

Modified: 2026-04-24T16:27:44.277

Link: CVE-2026-3347

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-03-25T14:41:50Z

Weaknesses