Vulnerability in metabox Meta Box – A Framework for Dynamic Websites

[ Description ]Official description

The Meta Box – A Framework for Dynamic Websites plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'profile_background[<attacker-chosen key>]' parameter in all versions up to, and including, 5.15.2 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. Exploitability depends on a consuming plugin or theme built on Meta Box that exposes the background field to lower-privileged users and renders stored values via the rwmb_the_value()/format_single_value() pattern; the effective minimum privilege is whatever role that consumer permits, demonstrated at Subscriber level.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• github.com/wpmetabox/meta-box/pull/1709
• plugins.trac.wordpress.org/browser/meta-box/tags/5.15.2/inc/fields/background.php
• plugins.trac.wordpress.org/browser/meta-box/tags/5.15.2/inc/sanitizer.php
• plugins.trac.wordpress.org/browser/meta-box/tags/5.15.3/inc/fields/background.php
• www.wordfence.com/threat-intel/vulnerabilities/id/7a8948f5-8bcf-48f2-b3a6-bfa24ba9bef0