CVE-2026-120687
7.2, highFooplugins Lightbox & Modal Popup WordPress Plugin - FooBox Cross-Site Scripting Vulnerability
- CVSS
- 7.2, high high CVSS v3.1
- EPSS, next 30 days
- n/a
- Exploitation
- No public evidence
- Published
- 14 Nov 2026yesterday
Description
The Lightbox & Modal Popup WordPress Plugin - FooBox plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via the 'img alt attribute inside .wp-caption container' parameter in all versions up to, and including, 2.8.7 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is exploitable by Subscriber-level users when bbPress is installed, as its bbp_filter_kses filter chain permits img and pre tags while preserving numeric character references inside attribute values, allowing encoded payloads to bypass save-time sanitization and reach the vulnerable sink fully intact. Exploitation by attackers with subscriber-level access and above requires that bbPress 2.6.20 is installed, a public forum exists, and either the first topic has already been approved or subsequent topics clear moderation. On a default installation, where that is not configured, the vulnerability requires attackers with contributor-level access and above.
Details
- Vendor
- Fooplugins
- Product
- Lightbox & Modal Popup WordPress Plugin - FooBox
- Weakness
- CWE-79 (opens in a new tab)
- Status
- Deferred
- Updated
- 14 Nov 2026
- Assigner
- security@wordfence.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
References 5
Other references 5
- plugins.trac.wordpress.org /browser/foobox-image-lightbox/tags/2.8.7/free/includes/class-script-generator.php#L175 (opens in a new tab)
- plugins.trac.wordpress.org /browser/foobox-image-lightbox/tags/2.8.7/free/js/foobox.free.min.js (opens in a new tab)
- plugins.trac.wordpress.org /changeset/3789888/foobox-image-lightbox (opens in a new tab)
- plugins.trac.wordpress.org /changeset?reponame=&new=3789888%40foobox-image-lightbox%2Ftags%2F2.8.8&old=3741260%40foobox-image-lightbox%2Ftags%2F2.8.7 (opens in a new tab)
- wordfence.com /threat-intel/vulnerabilities/id/66b5a5a2-8f70-4a85-ad03-8bd159cafdf5?source=cve (opens in a new tab)
The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.
Beyond this page
Is CVE-2026-120687 in your network?
This page tells you how dangerous CVE-2026-120687 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.
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EXYS7600 OCELOT
Find it before attackers do
Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2026-120687 comes with the devices to patch.
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EXYS7950 KONDRA
Detect it if it's exploited
Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.
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Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 15 Nov 2026, not the live upstream state.