CVE-2025-47666
Published: 22 January 2026
Summary
CVE-2025-47666 is a high-severity Cross-site Scripting (CWE-79) vulnerability. Its CVSS base score is 7.1 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 5.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-15 (Information Output Filtering).
Deeper analysis
CVE-2025-47666 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as Reflected Cross-site Scripting (XSS) under CWE-79, in the WordPress plugin Image&Video FullScreen Background (lbg_fullscreen_fullwidth_slider). This issue affects all versions of the plugin from n/a through 1.6.7 inclusive. The vulnerability has a CVSS v3.1 base score of 7.1 (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L), indicating high severity due to network accessibility, low attack complexity, no privileges required, user interaction needed, and scope change with low impacts across confidentiality, integrity, and availability.
Remote attackers can exploit this reflected XSS vulnerability by crafting malicious links or inputs that, when interacted with by a user (e.g., via clicking or submitting), cause the plugin to reflect unsanitized input back into the web page. No authentication is needed, allowing unauthenticated attackers to target site visitors. Exploitation executes arbitrary JavaScript in the victim's browser context within the site's scope, potentially enabling session hijacking, data theft, or phishing, though limited to low-impact effects per the CVSS vector.
The Patchstack advisory (https://patchstack.com/database/Wordpress/Plugin/lbg_fullscreen_fullwidth_slider/vulnerability/wordpress-image-video-fullscreen-background-plugin-1-6-7-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve) documents the vulnerability specific to version 1.6.7 and earlier, recommending mitigation through updating the plugin to a patched version beyond 1.6.7.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-4103
Vulnerability details
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LambertGroup Image&Video FullScreen Background lbg_fullscreen_fullwidth_slider allows Reflected XSS.This issue affects Image&Video FullScreen Background: from n/a through <= 1.6.7.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Reflected XSS in public-facing WordPress plugin directly enables exploitation of the web application (T1190) and arbitrary JavaScript execution in victim browser (T1059.007) via crafted malicious links.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Requires validation and sanitization of all web inputs before reflection into HTML, directly blocking the unsanitized reflected XSS payload in the plugin.
Mandates output filtering/encoding of dynamically generated web content, neutralizing malicious script reflected from crafted links in versions <=1.6.7.
Requires timely remediation of known flaws, directly addressing the advisory's recommendation to update the plugin beyond 1.6.7 to eliminate the CWE-79 vulnerability.