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Vulnerability · Published Apr 17, 2026 · Assigned by Wordfence

CVE-2026-6443Essentialplugin Plugins (Various Versions) - Injected Backdoor

Critical 9.8

In plain English

A critical-severity security flaw in Accordion and Accordion Slider from essentialplugin. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.5%top 57.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 products (as reported)

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

Weakness: CWE-506 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References