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CVE-2026-120687 Lightbox & Modal Popup WordPress Plugin <= 2.8.7 - Unauthenticated Stored DOM-Based Cross-Site Scripting via Image Alt Attribute in .wp-caption Containers

7.2 high

High (7.2) in fooplugins lightbox & modal popup wordpress plugin – foobox.

On this page
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.

Severity

CVSS 3.1

7.2 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
CWE
CWE-79 Improper Neutralization of Input During Web Page Generation (Cross-site Scripting)
OWASP Top 10
A05:2025 Injection
Published
Modified
Assigned by
Wordfence (CNA)
NVD analysis
Deferred: the NVD does not plan to analyze it
Record from
the NVD, synced

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Affected

  • fooplugins:lightbox & modal popup wordpress plugin – foobox

Versions

From the CNA's record in the CVE List.

ProductAffected
fooplugins Lightbox & Modal Popup WordPress Plugin – FooBoxthrough 2.8.7

Attack patterns (CAPEC)

  • CAPEC-63 Cross-Site Scripting (XSS) Likelihood: High · Severity: Very High
  • CAPEC-85 AJAX Footprinting Likelihood: High · Severity: Low
  • CAPEC-209 XSS Using MIME Type Mismatch Severity: Medium
  • CAPEC-588 DOM-Based XSS Likelihood: High · Severity: Very High
  • CAPEC-591 Reflected XSS Likelihood: High · Severity: Very High
  • CAPEC-592 Stored XSS Likelihood: High · Severity: Very High

The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.

History

  1. The NVD deferred its analysis

Changes since this site first stored the record. The same for every record: /api/public/changes.

References

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