CVE-2026-123472: Meta Box WordPress Custom Fields Framework stored XSS

CVE-2026-123472 · Severity: medium · CVSS 6.5 · Published 2026-11-07

Meta Box is a WordPress plugin that provides a framework for creating custom fields in WordPress sites. A stored cross-site scripting vulnerability allows contributors or developers with plugin access to inject malicious scripts that execute in administrators' browsers, potentially stealing credentials or hijacking accounts. The vulnerability requires a privileged user to interact with a crafted payload.

Technologies: eLightUp Meta Box – WordPress Custom Fields Framework. Vendors: eLightUp.

Quick answers

Is CVE-2026-123472 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-123472 being exploited in the wild.
How severe is CVE-2026-123472?
Medium severity, with a CVSS score of 6.5, published 7 November 2026.
Which products and versions are affected?
eLightUp Meta Box – WordPress Custom Fields Framework through 5.15.3.
Is there a fix for CVE-2026-123472?
Yes: fixed in 5.15.4. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-123472 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-123472?
Check whether you run eLightUp Meta Box – WordPress Custom Fields Framework at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: 5.15.4

Technical details

The Meta Box plugin through version 5.15.3 fails to properly neutralize user input during web page generation, allowing stored XSS injection. Exploitation requires contributor or developer role privileges and user interaction (clicking a malicious link or visiting a crafted page). An attacker can inject scripts that persist and execute when administrators view the affected content.

Affected products

  • eLightUp Meta Box – WordPress Custom Fields Framework through 5.15.3

Timeline

  • 2026-11-07: disclosed

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.