EUVD-2026-70316
GHSA-5hjr-3m2v-64xv
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Stored XSS requires a victim to visit the injected page (UI:R); Contributor access needed (PR:L); scope change applies as payload executes in browser context.
Primary rating from Vendor (Wordfence).
CVSS VectorVendor: Wordfence
Lifecycle Timeline
2DescriptionCVE.org
The GutenKit - Page Builder Blocks, Patterns, and Templates for Gutenberg Block Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘postBodyCss’ parameter in all versions up to, and including, 2.4.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
AnalysisAI
Stored Cross-Site Scripting in GutenKit Page Builder (versions ≤2.4.4) allows authenticated Contributor-level WordPress users to inject persistent JavaScript via the 'postBodyCss' parameter, which executes in victim browsers whenever an affected page is visited. The vulnerability stems from insufficient sanitization of CSS body input before storage and inadequate output escaping on render, earning a CVSS 6.4 with scope-change (S:C) reflecting the browser-context boundary crossing. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid WordPress account with at minimum Contributor-level access (PR:L), which is a non-default but commonly provisioned role on multi-author sites. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 6.4 Medium score reflects the PR:L requirement (Contributor role) which meaningfully limits exposure compared to unauthenticated XSS, but the scope-change and stored nature elevate real-world risk above the numeric score suggests. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | A code fix has been committed to the WordPress plugin repository as changeset 3468273 (https://plugins.trac.wordpress.org/changeset/3468273/gutenkit-blocks-addon), indicating a patched release is available via the WordPress.org plugin directory update mechanism. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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