Vulnerability · Published Mar 21, 2026 · Assigned by Wordfence

CVE-2026-3347Multi Functional Flexi Lightbox <= 1.2 - Authenticated (Admin+) Stored Cross-Site Scripting via 'message' Parameter

Medium 5.5

In plain English

A medium-severity cross-site scripting in Multi Functional Flexi Lightbox from arevico. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities).

Severity (CVSS 3.1)5.5Medium

Exploit odds (30 days)0.3%top 80.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
arevico	Multi Functional Flexi Lightbox	0 – through 1.2

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

In plain English

Official description

Affected products (as reported)

References