CVE-2026-6443
Estado: AplazadaCrítica (9.8)—
All plugins by Essentialplugin for WordPress are vulnerable to an injected backdoor in various versions. This is due to the plugin being sold to a malicious threat actor that embedded a backdoor in all of the plugin's they acquired. This makes it possible for the threat actor to maintain a persistent backdoor and inject spam into the affected sites.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 9.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.65%
- Percentil entre todas las CVEs puntuadas: 49
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1195Supply Chain Compromiseinitial access95 % - Impacto principal
T1505.003Web Shellpersistence90 % - Impacto secundario
T1053Scheduled Task/Jobexecution · persistence · privilege escalation80 % - Impacto secundario
T1098.004SSH Authorized Keyspersistence · privilege escalation85 %
Plugin adquirido por actor malicioso con backdoor incrustado (T1195: cadena de suministro). Permite web shell persistente (T1505.003) e inyección de spam (T1053 tareas programadas, T1098.004 cuentas comprometidas).
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
CWE
- CWE-506
Referencias
JSON original (NVD)
Mostrar
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"vendor": "essentialplugin",
"product": "Popup Maker and Popup Anything – Popup for opt-ins and Lead Generation Conversions",
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"published": "2026-04-17T07:16:03.160",
"references": [
{
"url": "https://anchor.host/someone-bought-30-wordpress-plugins-and-planted-a-backdoor-in-all-of-them/",
"source": "security@wordfence.com"
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"value": "All plugins by Essentialplugin for WordPress are vulnerable to an injected backdoor in various versions. This is due to the plugin being sold to a malicious threat actor that embedded a backdoor in all of the plugin's they acquired. This makes it possible for the threat actor to maintain a persistent backdoor and inject spam into the affected sites."
}
],
"lastModified": "2026-06-17T11:00:49.877",
"sourceIdentifier": "security@wordfence.com"
}