EUVD-2026-53903
GHSA-pfhc-6c7h-5cc4
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Network-reachable via standard HTTP; requires low-privilege Contributor account; only partial confidentiality loss with no integrity or availability impact.
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
Lifecycle Timeline
1DescriptionCVE.org
Contributor Sensitive Data Exposure in Gutenberg Blocks by Kadence Blocks <= 3.7.8 versions.
AnalysisAI
Sensitive data exposure in the Gutenberg Blocks by Kadence Blocks WordPress plugin (versions <= 3.7.8) allows authenticated Contributor-level users to access information they should not be permitted to view. The CVSS vector (PR:L/C:L) confirms this is a low-privilege, partial confidentiality breach rather than a full data dump, limiting its severity to medium-low. No public exploit code has been identified and CISA KEV does not list this vulnerability, indicating no confirmed active exploitation at time of analysis.
Technical ContextAI
Gutenberg Blocks by Kadence Blocks is a WordPress plugin (CPE: cpe:2.3:a:nexcess:gutenberg_blocks_by_kadence_blocks) that extends the WordPress block editor with additional UI components. The root cause is CWE-201 (Insertion of Sensitive Information Into Sent Data), meaning the plugin includes data in API responses or block output that is sensitive but not filtered by the contributor permission tier. WordPress roles are hierarchical; Contributors can create draft posts but cannot publish or access admin-level data - yet this flaw allows them to receive sensitive fields the plugin failed to strip from its response payload. The network-accessible (AV:N) vector indicates this is reachable over standard HTTP without physical or local access.
RemediationAI
Update the Gutenberg Blocks by Kadence Blocks plugin beyond version 3.7.8. A patch is available per the Patchstack advisory (https://patchstack.com/database/wordpress/plugin/kadence-blocks/vulnerability/wordpress-gutenberg-blocks-by-kadence-blocks-plugin-3-7-8-sensitive-data-exposure-vulnerability); however, the exact patched release version was not independently confirmed in the available intelligence data - verify the target version via the WordPress plugin repository or vendor changelog before upgrading. As a compensating control, site administrators can audit and demote untrusted Contributor-level accounts, or restrict Contributor registration if open registration is enabled - this removes the required PR:L prerequisite entirely. Note that blocking Contributor access may affect editorial workflows on sites with community authorship models.
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