arevico Multi Functional Flexi Lightbox Plugin up to 1.2 on WordPress arv_lb_options_val Message cross site scripting

Summaryinfo

A vulnerability marked as problematic has been reported in arevico Multi Functional Flexi Lightbox Plugin up to 1.2 on WordPress. This issue affects the function arv_lb_options_val. This manipulation of the argument Message causes cross site scripting. The identification of this vulnerability is CVE-2026-3347. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in arevico Multi Functional Flexi Lightbox Plugin up to 1.2 on WordPress. Affected by this vulnerability is the function arv_lb_options_val. The manipulation of the argument message with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity. The summary by CVE is:

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.

The weakness was shared by san6051. It is possible to read the advisory at wordfence.com. This vulnerability is known as CVE-2026-3347 since 02/27/2026. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 1.2 eliminates this vulnerability.

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Productinfo

Type

• WordPress Plugin

Vendor

• arevico

Name

• Multi Functional Flexi Lightbox Plugin

Version

• 1.0
• 1.1
• 1.2

CPE 2.3info

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CPE 2.2info

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