FKIE_CVE-2026-6443
Vulnerability from fkie_nvd - Published: 2026-04-17 07:16 - Updated: 2026-06-17 11:00
Severity
Summary
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.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Accordion and Accordion Slider",
"vendor": "essentialplugin",
"versions": [
{
"status": "affected",
"version": "1.4.6"
}
]
},
{
"defaultStatus": "unaffected",
"product": "Portfolio and Projects",
"vendor": "essentialplugin",
"versions": [
{
"status": "affected",
"version": "1.5.6"
}
]
},
{
"defaultStatus": "unaffected",
"product": "Featured Post Creative",
"vendor": "essentialplugin",
"versions": [
{
"status": "affected",
"version": "1.5.7"
}
]
},
{
"defaultStatus": "unaffected",
"product": "Post grid and filter ultimate",
"vendor": "essentialplugin",
"versions": [
{
"status": "affected",
"version": "1.7.4"
}
]
},
{
"defaultStatus": "unaffected",
"product": "WP Featured Content and Slider",
"vendor": "essentialplugin",
"versions": [
{
"status": "affected",
"version": "1.7.6"
}
]
},
{
"defaultStatus": "unaffected",
"product": "Post Ticker Ultimate",
"vendor": "essentialplugin",
"versions": [
{
"status": "affected",
"version": "1.7.6"
}
]
},
{
"defaultStatus": "unaffected",
"product": "Trending/Popular Post Slider and Widget",
"vendor": "essentialplugin",
"versions": [
{
"status": "affected",
"version": "1.8.6"
}
]
},
{
"defaultStatus": "unaffected",
"product": "Meta Slider and Carousel with Lightbox",
"vendor": "essentialplugin",
"versions": [
{
"status": "affected",
"version": "2.0.8"
}
]
},
{
"defaultStatus": "unaffected",
"product": "Album and Image Gallery Plus Lightbox",
"vendor": "essentialplugin",
"versions": [
{
"status": "affected",
"version": "2.1.8"
}
]
},
{
"defaultStatus": "unaffected",
"product": "Timeline and History slider",
"vendor": "essentialplugin",
"versions": [
{
"status": "affected",
"version": "2.4.5"
}
]
},
{
"defaultStatus": "unaffected",
"product": "WP Blog and Widgets",
"vendor": "essentialplugin",
"versions": [
{
"status": "affected",
"version": "2.6.6"
}
]
},
{
"defaultStatus": "unaffected",
"product": "Countdown Timer Ultimate",
"vendor": "essentialplugin",
"versions": [
{
"status": "affected",
"version": "2.6.9"
}
]
},
{
"defaultStatus": "unaffected",
"product": "Blog Designer \u2013 Post and Widget",
"vendor": "essentialplugin",
"versions": [
{
"status": "affected",
"version": "2.7.7"
}
]
},
{
"defaultStatus": "unaffected",
"product": "Team Slider and Team Grid Showcase plus Team Carousel",
"vendor": "essentialplugin",
"versions": [
{
"status": "affected",
"version": "2.8.6"
}
]
},
{
"defaultStatus": "unaffected",
"product": "Video gallery and Player",
"vendor": "essentialplugin",
"versions": [
{
"status": "affected",
"version": "2.8.7"
}
]
},
{
"defaultStatus": "unaffected",
"product": "Popup Maker and Popup Anything \u2013 Popup for opt-ins and Lead Generation Conversions",
"vendor": "essentialplugin",
"versions": [
{
"status": "affected",
"version": "2.9.1"
}
]
},
{
"defaultStatus": "unaffected",
"product": "Testimonial Grid and Testimonial Slider plus Carousel with Rotator Widget",
"vendor": "essentialplugin",
"versions": [
{
"status": "affected",
"version": "3.5.6"
}
]
},
{
"defaultStatus": "unaffected",
"product": "WP Responsive Recent Post Slider/Carousel",
"vendor": "essentialplugin",
"versions": [
{
"status": "affected",
"version": "3.7.1"
}
]
},
{
"defaultStatus": "unaffected",
"product": "WP Slick Slider and Image Carousel",
"vendor": "essentialplugin",
"versions": [
{
"status": "affected",
"version": "3.7.8.1"
}
]
},
{
"defaultStatus": "unaffected",
"product": "WP Logo Showcase Responsive Slider and Carousel",
"vendor": "essentialplugin",
"versions": [
{
"status": "affected",
"version": "3.8.7"
}
]
},
{
"defaultStatus": "unaffected",
"product": "WP responsive FAQ with category plugin",
"vendor": "essentialplugin",
"versions": [
{
"status": "affected",
"version": "3.9.5"
}
]
},
{
"defaultStatus": "unaffected",
"product": "WP News and Scrolling Widgets",
"vendor": "essentialplugin",
"versions": [
{
"status": "affected",
"version": "5.0.6"
}
]
}
],
"source": "security@wordfence.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"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\u0027s they acquired. This makes it possible for the threat actor to maintain a persistent backdoor and inject spam into the affected sites."
}
],
"id": "CVE-2026-6443",
"lastModified": "2026-06-17T11:00:49.877",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.9,
"source": "security@wordfence.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-6443",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-17T18:49:32.019393Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-04-17T07:16:03.160",
"references": [
{
"source": "security@wordfence.com",
"url": "https://anchor.host/someone-bought-30-wordpress-plugins-and-planted-a-backdoor-in-all-of-them/"
},
{
"source": "security@wordfence.com",
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/2597724a-9a39-4e46-b153-f42366f833ba?source=cve"
}
],
"sourceIdentifier": "security@wordfence.com",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-506"
}
],
"source": "security@wordfence.com",
"type": "Secondary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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