CVE-2026-6443
CRITICAL
9.8
CVSS 3.1
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.
Metadata
Severity & Metrics
9.8
CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC — CISA Coordinator
Affected products (22)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| essentialplugin | Accordion and Accordion Slider | — | 1.4.6 |
| essentialplugin | Album and Image Gallery Plus Lightbox | — | 2.1.8 |
| essentialplugin | Blog Designer – Post and Widget | — | 2.7.7 |
| essentialplugin | Countdown Timer Ultimate | — | 2.6.9 |
| essentialplugin | Featured Post Creative | — | 1.5.7 |
| essentialplugin | Meta Slider and Carousel with Lightbox | — | 2.0.8 |
| essentialplugin | Popup Maker and Popup Anything – Popup for opt-ins and Lead Generation Conversions | — | 2.9.1 |
| essentialplugin | Portfolio and Projects | — | 1.5.6 |
| essentialplugin | Post grid and filter ultimate | — | 1.7.4 |
| essentialplugin | Post Ticker Ultimate | — | 1.7.6 |
| essentialplugin | Team Slider and Team Grid Showcase plus Team Carousel | — | 2.8.6 |
| essentialplugin | Testimonial Grid and Testimonial Slider plus Carousel with Rotator Widget | — | 3.5.6 |
| essentialplugin | Timeline and History slider | — | 2.4.5 |
| essentialplugin | Trending/Popular Post Slider and Widget | — | 1.8.6 |
| essentialplugin | Video gallery and Player | — | 2.8.7 |
| essentialplugin | WP Blog and Widgets | — | 2.6.6 |
| essentialplugin | WP Featured Content and Slider | — | 1.7.6 |
| essentialplugin | WP Logo Showcase Responsive Slider and Carousel | — | 3.8.7 |
| essentialplugin | WP News and Scrolling Widgets | — | 5.0.6 |
| essentialplugin | WP responsive FAQ with category plugin | — | 3.9.5 |
| essentialplugin | WP Responsive Recent Post Slider/Carousel | — | 3.7.1 |
| essentialplugin | WP Slick Slider and Image Carousel | — | 3.7.8.1 |
Weakness (CWE)
| CWE | Source | Description |
|---|---|---|
| CWE-506 | cna | CWE-506 Embedded Malicious Code |
CVSS scores (1)
| Score | Severity | Version | Source | Vector |
|---|---|---|---|---|
| 9.8 | CRITICAL | 3.1 | cna | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
References (2)