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CVE record · CVE-2026-6443

Essentialplugin Plugins (Various Versions) - Injected Backdoor

CVSS 9.8 CriticalCriticalEPSS 0.0050 · 42nd percentile

Critical, because:

  • CVSS score 9.8: 9.0 or more.

How we decide what’s critical

Published by the CVE Program (CNA: Wordfence) at 17 Apr 2026, 06:44 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
essentialplugin Accordion and Accordion Slider
  • affected 1.4.6
Other versions: unaffected
essentialplugin Portfolio and Projects
  • affected 1.5.6
Other versions: unaffected
essentialplugin Featured Post Creative
  • affected 1.5.7
Other versions: unaffected
essentialplugin Post grid and filter ultimate
  • affected 1.7.4
Other versions: unaffected
essentialplugin WP Featured Content and Slider
  • affected 1.7.6
Other versions: unaffected
essentialplugin Post Ticker Ultimate
  • affected 1.7.6
Other versions: unaffected
essentialplugin Trending/Popular Post Slider and Widget
  • affected 1.8.6
Other versions: unaffected
essentialplugin Meta Slider and Carousel with Lightbox
  • affected 2.0.8
Other versions: unaffected
essentialplugin Album and Image Gallery Plus Lightbox
  • affected 2.1.8
Other versions: unaffected
essentialplugin Timeline and History slider
  • affected 2.4.5
Other versions: unaffected
essentialplugin WP Blog and Widgets
  • affected 2.6.6
Other versions: unaffected
essentialplugin Countdown Timer Ultimate
  • affected 2.6.9
Other versions: unaffected
essentialplugin Blog Designer – Post and Widget
  • affected 2.7.7
Other versions: unaffected
essentialplugin Team Slider and Team Grid Showcase plus Team Carousel
  • affected 2.8.6
Other versions: unaffected
essentialplugin Video gallery and Player
  • affected 2.8.7
Other versions: unaffected
essentialplugin Popup Maker and Popup Anything – Popup for opt-ins and Lead Generation Conversions
  • affected 2.9.1
Other versions: unaffected
essentialplugin Testimonial Grid and Testimonial Slider plus Carousel with Rotator Widget
  • affected 3.5.6
Other versions: unaffected
essentialplugin WP Responsive Recent Post Slider/Carousel
  • affected 3.7.1
Other versions: unaffected
essentialplugin WP Slick Slider and Image Carousel
  • affected 3.7.8.1
Other versions: unaffected
essentialplugin WP Logo Showcase Responsive Slider and Carousel
  • affected 3.8.7
Other versions: unaffected
essentialplugin WP responsive FAQ with category plugin
  • affected 3.9.5
Other versions: unaffected
essentialplugin WP News and Scrolling Widgets
  • affected 5.0.6
Other versions: unaffected
Identifiers
CVE-2026-6443
CNA
Wordfence
Weakness (CWE)
CWE-506
Tags
Published
17 Apr 2026
Updated
21 Apr 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.8 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CNA (Wordfence)
  • CISA KEV Not listed.
  • EPSS 0.0050, the 42nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 17 Apr 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.