EUVD-2026-66406
GHSA-8jxx-fm8x-v9qp
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Contributor-level auth required (PR:L); stored payload only fires when a victim visits the injected page (UI:R); impact confined to victim browser context with scope change (S:C), no availability impact.
Primary rating from Vendor (Wordfence).
CVSS VectorVendor: Wordfence
Lifecycle Timeline
2DescriptionCVE.org
The Greenshift - animation and page builder blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the customapi action handler in versions up to, and including, 12.8.9. This is due to insufficient sanitization of API responses before output via innerHTML. 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 the injected page.
AnalysisAI
Stored Cross-Site Scripting in the Greenshift animation and page builder blocks WordPress plugin (versions up to and including 12.8.9) allows authenticated attackers holding at minimum Contributor-level access to inject persistent malicious JavaScript via the plugin's customapi action handler. The root cause is unsanitized API response content written directly to the DOM through innerHTML in two JavaScript modules within the plugin. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an active WordPress session authenticated at minimum as a Contributor role - unauthenticated exploitation is not possible. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 6.4 (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N) reflects medium-severity stored XSS gated behind low-privilege authentication. … 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 | Update the Greenshift - animation and page builder blocks plugin to the latest available version beyond 12.8.9 through the WordPress admin plugin dashboard; the upstream fix is documented in SVN changeset 3494855 at https://plugins.trac.wordpress.org/changeset/3494855/, though the precise first-patched release version is not independently confirmed from available data. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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