Vulnerabilidad · Publicado 25/09/2026
El plugin Zero Spam para WordPress es vulnerable a inyección de scripts maliciosos (XSS almacenado) en versiones hasta 5.7.10 mediante arrays POST anidados en integración con Contact Form 7. Atacantes no autenticados pueden ejecutar código JavaScript en páginas públicas cuando usuarios acceden a formularios comprometidos, afectando sitios empresariales, tiendas en línea y portales de atención al cliente en México y LATAM que usen este plugin.
The Zero Spam for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Nested POST Array Keys via Contact Form 7 Integration in all versions up to, and including, 5.7.10 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 payload is delivered by submitting a Contact Form 7 request with a nested POST array key containing arbitrary HTML or JavaScript — PHP parses the field name into a nested array key, which is stored verbatim in the zerospam_log.submission_data column when Zero Spam flags the submission as spam due to the absence of the zerospam_david_walsh_key field.
Score: 7.2/10 — Severidad: HIGH — Estado NIST: Received
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
CWE-79
Publicado en NIST NVD.