Stored cross-site scripting in Meow Lightbox plugin for WordPress
Key facts
- Attack vector
- Network
- Privileges required
- Low
- 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
All versions of the Meow Lightbox plugin for WordPress up to and including 5.6.2 are affected. Insufficient input sanitization and output escaping (CWE-79) let injected script be stored through the display name and comment fields. An authenticated attacker with subscriber-level access or higher can inject scripts that run when a user opens an injected page. The flaw is only exploitable when the plugin's Output Buffering option is enabled, which is disabled by default, and the attacker needs a previously approved comment so that new comments are approved automatically.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
The Meow Lightbox plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'display_name + comment' parameter in all versions up to, and including, 5.6.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This vulnerability is only exploitable when the plugin's Output Buffering option is enabled (disabled by default), and requires the attacker to have at least one previously approved comment on the site so that subsequent comments are auto-approved by WordPress core.
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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| tigroumeow | Meow Lightbox | up to 5.6.2 | — | No fix listed | CNA |
- Meow Lightbox Vendortigroumeow Affected up to 5.6.2 Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for Meow Lightbox.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Timeline
- 2026-10-14 Threatist record created from CVE-2026-107756
- 2026-10-14 Alias added: GHSA-6wgq-mq9p-cpvg
- 2026-10-14 Priority changed: MEDIUM → LOW
- 2026-10-16 CISA SSVC decision points changed
References
Other 11
- https://www.wordfence.com/threat-intel/vulnerabilities/id/69de4c0b-fda4-4dd0-80ae-2cdd53fc581b?source=cve
- 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#L503
- 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#L2112
- 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#L2207
- 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#L1531
- 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#L1087
- https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/classes/core.php#L1277
- https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/classes/core.php#L57
- https://plugins.trac.wordpress.org/changeset/3737480/meow-lightbox
- https://plugins.trac.wordpress.org/changeset/3737480/meow-lightbox/trunk/vendor/kub-at/php-simple-html-dom-parser/src/KubAT/PhpSimple/lib/simple_html_dom.php
More tigroumeow vulnerabilities
- TI-2025-10772 AI Engine <= 3.1.3 - Unauthenticated Sensitive Information Exposure to Privilege Escalation CVSS 3.1CRITICAL 9.8
- TI-2023-28063 WordPress AI Engine plugin <= 1.9.98 - Unauthenticated Arbitrary File Upload vulnerability CVSS 3.1CRITICAL 10.0
- TI-2024-09725 AI-Engine < 2.6.5 - Admin+ SQLi CVSS 3.1HIGH 7.2
- TI-2024-05988 AI Engine < 2.5.1 - Admin+ RCE CVSS 3.1HIGH 7.2
- TI-2024-19264 WordPress AI Engine plugin <= 2.1.4 - Server Side Request Forgery (SSRF) vulnerability CVSS 3.1MEDIUM 6.8
- TI-2024-06230 AI Engine < 2.4.8 - Admin+ SQLi CVSS 3.1MEDIUM 4.7
Sources
- CVE-2026-107756 · CVE Program
- CVE-2026-107756 · NVD
- FIRST EPSS
- GHSA-6wgq-mq9p-cpvg · 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