---
title: "CVE-2026-109234: Meow Lightbox WordPress Plugin - Stored XSS"
description: "Meow Lightbox WordPress plugin <= 5.6.4 contains a stored cross-site scripting caused by insufficient input sanitization and output escaping in 'post_content' parameter, letting unauthenticated attackers execute arbitrary JavaScript, exploit requires specific plugin settings and stored HTML submission surface."
url: https://panop.io/threat-heartbeat/CVE-2026-109234/
---

# CVE-2026-109234 Meow Lightbox WordPress Plugin - Stored XSS

Meow Lightbox WordPress plugin <= 5.6.4 contains a stored cross-site scripting caused by insufficient input sanitization and output escaping in 'post\_content' parameter, letting unauthenticated attackers execute arbitrary JavaScript, exploit requires specific plugin settings and stored HTML submission surface.

CVSS base score 7.2 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.38% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-109234)

## Details

Type

Stored XSS

Impact

Client Script Exec

CVSS vector

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

Published

31 October 2026

Updated

1 November 2026

Weakness

[CWE-79](https://cwe.mitre.org/data/definitions/79.html)

## Vendor fix

Update to the latest version beyond 5.6.4.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-109234](https://nvd.nist.gov/vuln/detail/CVE-2026-109234)
- [https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/classes/core.php#L1142](https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/classes/core.php#L1142)
- [https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/classes/core.php#L1276](https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/classes/core.php#L1276)
- [https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/classes/core.php#L901](https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/classes/core.php#L901)
- [https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/vendor/kub-at/php-simple-html-dom-parser/src/KubAT/PhpSimple/lib/simple\_html\_dom.php#L2043](https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/vendor/kub-at/php-simple-html-dom-parser/src/KubAT/PhpSimple/lib/simple_html_dom.php#L2043)
- [https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/vendor/kub-at/php-simple-html-dom-parser/src/KubAT/PhpSimple/lib/simple\_html\_dom.php#L490](https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/vendor/kub-at/php-simple-html-dom-parser/src/KubAT/PhpSimple/lib/simple_html_dom.php#L490)
- [https://plugins.trac.wordpress.org/changeset?old\_path=/meow-lightbox/tags/5.6.4&new\_path=/meow-lightbox/tags/5.6.5](https://plugins.trac.wordpress.org/changeset?old_path=/meow-lightbox/tags/5.6.4&new_path=/meow-lightbox/tags/5.6.5)
- [https://www.wordfence.com/threat-intel/vulnerabilities/id/45fcd17e-10d5-4357-84cc-2527b07b584e?source=cve](https://www.wordfence.com/threat-intel/vulnerabilities/id/45fcd17e-10d5-4357-84cc-2527b07b584e?source=cve)
- [https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/classes/core.php#L1115](https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/classes/core.php#L1115)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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