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CVE-2026-6443

CRITICAL 9.8 CVSS 3.1
Published
April 17, 2026
Last modified
October 26, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-506
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

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.

Affected WordPress components

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • essentialplugin Accordion and Accordion Slider — Version 1.4.6
  • essentialplugin Portfolio and Projects — Version 1.5.6
  • essentialplugin Featured Post Creative — Version 1.5.7
  • essentialplugin Post grid and filter ultimate — Version 1.7.4
  • essentialplugin WP Featured Content and Slider — Version 1.7.6
  • essentialplugin Post Ticker Ultimate — Version 1.7.6
  • essentialplugin Trending/Popular Post Slider and Widget — Version 1.8.6
  • essentialplugin Meta Slider and Carousel with Lightbox — Version 2.0.8
  • essentialplugin Album and Image Gallery Plus Lightbox — Version 2.1.8
  • essentialplugin Timeline and History slider — Version 2.4.5
  • essentialplugin WP Blog and Widgets — Version 2.6.6
  • essentialplugin Countdown Timer Ultimate — Version 2.6.9
  • essentialplugin Blog Designer – Post and Widget — Version 2.7.7
  • essentialplugin Team Slider and Team Grid Showcase plus Team Carousel — Version 2.8.6
  • essentialplugin Video gallery and Player — Version 2.8.7
  • essentialplugin Popup Maker and Popup Anything – Popup for opt-ins and Lead Generation Conversions — Version 2.9.1
  • essentialplugin Testimonial Grid and Testimonial Slider plus Carousel with Rotator Widget — Version 3.5.6
  • essentialplugin WP Responsive Recent Post Slider/Carousel — Version 3.7.1
  • essentialplugin WP Slick Slider and Image Carousel — Version 3.7.8.1
  • essentialplugin WP Logo Showcase Responsive Slider and Carousel — Version 3.8.7
  • essentialplugin WP responsive FAQ with category plugin — Version 3.9.5
  • essentialplugin WP News and Scrolling Widgets — Version 5.0.6

References

  • anchor.host https://anchor.host/someone-bought-30-wordpress-plugins-and-planted-a-backdoor-in-all-of-them/
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/2597724a-9a39-4e46-b153-f42366f833ba?source=cve
  • nvd.nist.gov Official NVD record