Multi Functional Flexi Lightbox <= 1.2 - Authenticated (Admin+) Stored Cross-Site Scripting via 'message' Parameter
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-3347
- 2026-10-03 Alias added: GHSA-gv9p-wq55-477w
References
Other 5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/a4c0b14a-d039-4008-a433-ab3605e2612c?source=cve
- https://plugins.trac.wordpress.org/browser/multi-functional-flexi-lightbox/tags/1.2/sp.php#L37
- https://plugins.trac.wordpress.org/browser/multi-functional-flexi-lightbox/tags/1.2/options.php#L94
- https://plugins.trac.wordpress.org/browser/multi-functional-flexi-lightbox/trunk/sp.php#L37
- https://plugins.trac.wordpress.org/browser/multi-functional-flexi-lightbox/trunk/options.php#L94
More Arevico vulnerabilities
- TI-2025-42343 WordPress WP Simple Redirect plugin <= 1.1 - Reflected Cross Site Scripting (XSS) vulnerability CVSS 3.1HIGH 7.1
- TI-2025-36565 WordPress WP Tactical Popup plugin <= 1.1 - Reflected Cross Site Scripting (XSS) vulnerability CVSS 3.1HIGH 7.1
Sources
- CVE-2026-3347 · CVE Program
- CVE-2026-3347 · NVD
- FIRST EPSS
- GHSA-gv9p-wq55-477w · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences