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

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Summary

CVECVE-2026-3347
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-21 04:17:21 UTC
Updated2026-04-24 16:27:44 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

EPSS: 0.000430000 probability, percentile 0.131070000 (date 2026-04-24)

Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED5.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Arevico Multi Functional Flexi Lightbox affected 1.2 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/multi-functional-flexi-lightbox/tags/1.2/options.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/multi-functional-flexi-lightbox/trunk/options.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/multi-functional-flexi-lightbox/tags/1.2/sp.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/multi-functional-flexi-lightbox/trunk/sp.php [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/a4c0b14a-d039-4008-a433-ab360... [email protected] www.wordfence.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: san6051 (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-03-20T15:13:42.000ZDisclosed
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