Stored XSS in European VAT Compliance Assistant for WooCommerce
Key facts
- Attack vector
- Network
- Privileges required
- None
- 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 davidanderson European VAT Compliance Assistant for WooCommerce plugin for WordPress is affected in all versions through 1.36.10. Insufficient input sanitization and output escaping (CWE-79) let a header value persist in order data and run in pages. An unauthenticated attacker can plant a script during a guest checkout, and it executes when a user opens the injected page.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
The European VAT Compliance Assistant for WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via CF-IPCountry Header in all versions up to, and including, 1.36.10 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The malicious header value is persisted verbatim into order post-meta during a guest checkout, meaning no account or authentication is required to plant the payload.
Why it matters now
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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| davidanderson | European VAT Compliance Assistant for WooCommerce | up to 1.36.10 | — | No fix listed | CNA |
- European VAT Compliance Assistant for WooCommerce Vendordavidanderson Affected up to 1.36.10 Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for European VAT Compliance Assistant for WooCommerce.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Timeline
- 2026-10-18 Threatist record created from CVE-2026-100316
- 2026-10-18 Alias added: GHSA-v4p8-57qj-v3xg
References
Other 6
- https://www.wordfence.com/threat-intel/vulnerabilities/id/9f17d266-e64f-4721-9c8d-5bc72791ef01?source=cve
- https://plugins.trac.wordpress.org/browser/woocommerce-eu-vat-compliance/tags/1.36.10/record-order-details.php#L740
- https://plugins.trac.wordpress.org/browser/woocommerce-eu-vat-compliance/tags/1.36.10/bootstrap.php#L1779
- https://plugins.trac.wordpress.org/browser/woocommerce-eu-vat-compliance/tags/1.36.10/record-order-details.php#L222
- https://plugins.trac.wordpress.org/changeset?reponame&new=3713548%40woocommerce-eu-vat-compliance&old=3676299%40woocommerce-eu-vat-compliance
- https://plugins.trac.wordpress.org/changeset/3713548/woocommerce-eu-vat-compliance/trunk/record-order-details.php
More davidanderson vulnerabilities
- TI-2026-09266 UpdraftPlus: WP Backup & Migration Plugin <= 1.26.4 - Unauthenticated Authentication Bypass via UpdraftCentral udrpc CVSS 3.1HIGH 8.1
- TI-2026-07417 All-In-One Security (AIOS) <= 5.4.7 - Unauthenticated Stored Cross-Site Scripting via REST API Request Path CVSS 3.1HIGH 7.2
- TI-2024-10156 UpdraftPlus: WP Backup & Migration Plugin 1.23.8 - 1.24.11 - Unauthenticated PHP Object Injection CVSS 3.1HIGH 8.8
- TI-2024-06331 Redux Framework 4.4.12 - 4.4.17 - Unauthenticated JSON File Upload to Stored Cross-Site Scripting CVSS 3.1HIGH 7.2
- TI-2026-06366 WP-Optimize <= 4.5.2 - Authenticated (Author+) Arbitrary File Deletion via 'original-file' Post Meta CVSS 3.1HIGH 8.1
- TI-2025-43896 Privilege escalation in Redux Framework lets subscribers set roles CVSS 3.1MEDIUM 6.8
Sources
- CVE-2026-100316 · CVE Program
- CVE-2026-100316 · NVD
- FIRST EPSS
- GHSA-v4p8-57qj-v3xg · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences