{"id":"CVE-2026-109216","title":"Meta Box <= 5.15.2 - Authenticated (Subscriber+) Stored Cross-Site Scripting via Background Field Array Keys","summary":"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 insuffici…","severity":"medium","cvss":4.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N","cvssSource":"cna","cwe":["CWE-79"],"vendor":"metabox","product":"Meta Box – A Framework for Dynamic Websites","affected":["meta_box_a_framework_for_dynamic_websites <= 5.15.2"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-29T12:17:36.454458Z"},"published":"2026-10-29","updated":"2026-10-29","sourceUpdated":"2026-10-29T12:36:51.108Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-109216","references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/7a8948f5-8bcf-48f2-b3a6-bfa24ba9bef0?source=cve"},{"url":"https://plugins.trac.wordpress.org/browser/meta-box/tags/5.15.2/inc/fields/background.php#L154"},{"url":"https://plugins.trac.wordpress.org/browser/meta-box/tags/5.15.2/inc/sanitizer.php#L170"},{"url":"https://github.com/wpmetabox/meta-box/pull/1709"},{"url":"https://plugins.trac.wordpress.org/browser/meta-box/tags/5.15.3/inc/fields/background.php"}],"tags":["cve.org"],"epss":0.00228,"epssPercentile":0.1365,"ingestedAt":"2026-11-01T17:57:46.238Z","slug":"CVE-2026-109216","body":"## Overview\n\nThe 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.\n\n## Affected\n\n- `meta_box_a_framework_for_dynamic_websites <= 5.15.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":27,"depthScoreParts":{"impact":27,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}