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TI-2025-03940 Aliases CVE-2025-4420GHSA-g47q-4gcv-4qvr

Cross-site scripting in themehunk Vayu Blocks – Website Builder for the Block Editor

Priority LOW 28CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

The Vayu Blocks – Gutenberg Blocks for WordPress & WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘containerWidth’ parameter in all versions up to, and including, 1.3.1 due to a missing capability check on the vayu_blocks_option_panel_callback() function and 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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00301 22nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
themehunkVayu Blocks – Website Builder for the Block Editorup to 1.3.1—No fix listedCNA
  • Vayu Blocks – Website Builder for the Block Editor Vendorthemehunk Affected up to 1.3.1 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-4420
  2. 2026-10-03 Alias added: GHSA-g47q-4gcv-4qvr

References

Other 4

  • TI-2024-11108 Hunk Companion < 1.9.0 - Unauthenticated Plugin Installation CVSS 3.1CRITICAL 9.8
  • TI-2024-08412 Code injection in themehunk WP Popup Builder – Popup Forms and Marketing Lead Generation CVSS 3.1CRITICAL 9.8
  • TI-2024-09385 Improper access control in themehunk Vayu Blocks – Website Builder for the Block Editor CVSS 3.1CRITICAL 9.8
  • TI-2024-09004 Hunk Companion <= 1.8.4 - Missing Authorization to Unauthenticated Arbitrary Plugin Installation/Activation CVSS 3.1CRITICAL 9.8
  • TI-2024-03392 Responsive Contact Form Builder & Lead Generation Plugin <= 1.8.9 - Admin+ Stored XSS CVSS 3.1MEDIUM 6.1
  • TI-2022-02219 WP Popup Builder < 1.2.9 - Reflected Cross-Site Scripting CVSS 3.1MEDIUM 6.1
See all 46 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences