Read the docs
TI-2026-83462 Aliases CVE-2026-109234GHSA-vv6j-8xxc-xhcc

Stored cross-site scripting in Meow Lightbox via bbPress replies

Priority LOW 32CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
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

The Meow Lightbox plugin for WordPress is vulnerable to stored cross-site scripting through the post_content (bbPress reply body) parameter in all versions up to and including 5.6.4, due to insufficient input sanitization and output escaping (CWE-79). An unauthenticated attacker can inject arbitrary web scripts that execute when a user accesses an injected page. This requires the administrator to have enabled Output Buffering, the HtmlDomParser engine, and Aggressive Resolve, along with a stored-HTML submission surface such as bbPress anonymous replies whose allow-list preserves img attributes.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

The Meow Lightbox plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'post_content (bbPress reply body)' parameter in all versions up to, and including, 5.6.4 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 requires the administrator to have enabled Output Buffering, the HtmlDomParser engine, and Aggressive Resolve, as well as a stored-HTML submission surface (such as bbPress anonymous replies) whose kses allow-list preserves img attributes; given these preconditions, a one-shot unauthenticated submission can execute arbitrary JavaScript in the context of any user who views the affected page.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00383 32nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

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

VendorProductAffected versionsFixed inStatusSource
tigroumeowMeow Lightboxup to 5.6.4—No fix listedCNA
  • Meow Lightbox Vendortigroumeow Affected up to 5.6.4 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 · 2026-11-05

Timeline

  1. 2026-10-31 Threatist record created from CVE-2026-109234
  2. 2026-10-31 Alias added: GHSA-vv6j-8xxc-xhcc
  3. 2026-11-01 Priority changed: MEDIUM → LOW
  4. 2026-11-01 CISA SSVC decision points changed

References

Other 8

  • 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
See all 57 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences