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WordPress plugin

Essentialplugin Plugins (Various Versions) — Injected Backdoor

CVE-2026-6443Published · Updated

Action summary

Popup Maker and Popup Anything – Popup for opt-ins and Lead Generation Conversions: Affected: 2.9.1 – 2.9.1Update to 2.9.1.1 or newer

Featured Post Creative: Affected: 1.5.7 – 1.5.7Update to 1.5.7.1 or newer

Portfolio and Projects: Affected: 1.5.6 – 1.5.6Update to 1.5.6.1 or newer

Accordion and Accordion Slider: Affected: 1.4.6 – 1.4.6Update to 1.4.6.1 or newer

Video gallery and Player: Affected: 2.8.7 – 2.8.7Update to 2.8.7.1 or newer

Testimonial Grid and Testimonial Slider plus Carousel with Rotator Widget: Affected: 3.5.6 – 3.5.6Update to 3.5.6.1 or newer

WP Slick Slider and Image Carousel: Affected: 3.7.8.1 – 3.7.8.1Update to 3.7.8.2 or newer

WP Logo Showcase Responsive Slider and Carousel: Affected: 3.8.7 – 3.8.7Update to 3.8.7.1 or newer

Album and Image Gallery Plus Lightbox: Affected: 2.1.8 – 2.1.8Update to 2.1.8.1 or newer

Meta Slider and Carousel with Lightbox: Affected: 2.0.8 – 2.0.8Update to 2.0.8.1 or newer

Blog Designer – Post and Widget: Affected: 2.7.7 – 2.7.7Update to 2.7.7.1 or newer

WP News and Scrolling Widgets: Affected: 5.0.6 – 5.0.6Update to 5.0.6.1 or newer

Trending/Popular Post Slider and Widget: Affected: 1.8.6 – 1.8.6Update to 1.8.6.1 or newer

Countdown Timer Ultimate: Affected: 2.6.9 – 2.6.9Update to 2.6.9.1 or newer

WP Featured Content and Slider: Affected: 1.7.6 – 1.7.6Update to 1.7.6.1 or newer

Post Ticker Ultimate: Affected: 1.7.6 – 1.7.6Update to 1.7.6.1 or newer

Team Slider and Team Grid Showcase plus Team Carousel: Affected: 2.8.6 – 2.8.6Update to 2.8.6.1 or newer

Post grid and filter ultimate: Affected: 1.7.4 – 1.7.4Update to 1.7.4.1 or newer

WP Blog and Widgets: Affected: 2.6.6 – 2.6.6Update to 2.6.6.1 or newer

Timeline and History slider: Affected: 2.4.5 – 2.4.5Update to 2.4.5.1 or newer

WP responsive FAQ with category plugin: Affected: 3.9.5 – 3.9.5Update to 3.9.5.1 or newer

WP Responsive Recent Post Slider/Carousel: Affected: 3.7.1 – 3.7.1Update to 3.7.1.1 or newer

All remediation steps
Watch plugin
Severity
Critical9.8
CVSS
9.8
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:N User interaction
None
S:U Scope
Unchanged
C:H Confidentiality
High
I:H Integrity
High
A:H Availability
High
Weakness
CWE-506 Embedded Malicious Code
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Popup Maker and Popup Anything – Popup for opt-ins and Lead Generation Conversions popup-anything-on-click

  1. Affected2.9.1 – 2.9.1
  2. Patched in2.9.1.1

Update to 2.9.1.1 or newer.

You are affected if you run 2.9.1 – 2.9.1. Version 2.9.1.1 and later are not affected by this issue.

Featured Post Creative featured-post-creative

  1. Affected1.5.7 – 1.5.7
  2. Patched in1.5.7.1

Update to 1.5.7.1 or newer.

You are affected if you run 1.5.7 – 1.5.7. Version 1.5.7.1 and later are not affected by this issue.

Portfolio and Projects portfolio-and-projects

  1. Affected1.5.6 – 1.5.6
  2. Patched in1.5.6.1

Update to 1.5.6.1 or newer.

You are affected if you run 1.5.6 – 1.5.6. Version 1.5.6.1 and later are not affected by this issue.

Accordion and Accordion Slider accordion-and-accordion-slider

  1. Affected1.4.6 – 1.4.6
  2. Patched in1.4.6.1

Update to 1.4.6.1 or newer.

You are affected if you run 1.4.6 – 1.4.6. Version 1.4.6.1 and later are not affected by this issue.

Video gallery and Player html5-videogallery-plus-player

  1. Affected2.8.7 – 2.8.7
  2. Patched in2.8.7.1

Update to 2.8.7.1 or newer.

You are affected if you run 2.8.7 – 2.8.7. Version 2.8.7.1 and later are not affected by this issue.

Testimonial Grid and Testimonial Slider plus Carousel with Rotator Widget wp-testimonial-with-widget

  1. Affected3.5.6 – 3.5.6
  2. Patched in3.5.6.1

Update to 3.5.6.1 or newer.

You are affected if you run 3.5.6 – 3.5.6. Version 3.5.6.1 and later are not affected by this issue.

WP Slick Slider and Image Carousel wp-slick-slider-and-image-carousel

  1. Affected3.7.8.1 – 3.7.8.1
  2. Patched in3.7.8.2

Update to 3.7.8.2 or newer.

You are affected if you run 3.7.8.1 – 3.7.8.1. Version 3.7.8.2 and later are not affected by this issue.

WP Logo Showcase Responsive Slider and Carousel wp-logo-showcase-responsive-slider-slider

  1. Affected3.8.7 – 3.8.7
  2. Patched in3.8.7.1

Update to 3.8.7.1 or newer.

You are affected if you run 3.8.7 – 3.8.7. Version 3.8.7.1 and later are not affected by this issue.

Album and Image Gallery Plus Lightbox album-and-image-gallery-plus-lightbox

  1. Affected2.1.8 – 2.1.8
  2. Patched in2.1.8.1

Update to 2.1.8.1 or newer.

You are affected if you run 2.1.8 – 2.1.8. Version 2.1.8.1 and later are not affected by this issue.

Meta Slider and Carousel with Lightbox meta-slider-and-carousel-with-lightbox

  1. Affected2.0.8 – 2.0.8
  2. Patched in2.0.8.1

Update to 2.0.8.1 or newer.

You are affected if you run 2.0.8 – 2.0.8. Version 2.0.8.1 and later are not affected by this issue.

Blog Designer – Post and Widget blog-designer-for-post-and-widget

  1. Affected2.7.7 – 2.7.7
  2. Patched in2.7.7.1

Update to 2.7.7.1 or newer.

You are affected if you run 2.7.7 – 2.7.7. Version 2.7.7.1 and later are not affected by this issue.

WP News and Scrolling Widgets sp-news-and-widget

  1. Affected5.0.6 – 5.0.6
  2. Patched in5.0.6.1

Update to 5.0.6.1 or newer.

You are affected if you run 5.0.6 – 5.0.6. Version 5.0.6.1 and later are not affected by this issue.

Trending/Popular Post Slider and Widget wp-trending-post-slider-and-widget

  1. Affected1.8.6 – 1.8.6
  2. Patched in1.8.6.1

Update to 1.8.6.1 or newer.

You are affected if you run 1.8.6 – 1.8.6. Version 1.8.6.1 and later are not affected by this issue.

Countdown Timer Ultimate countdown-timer-ultimate

  1. Affected2.6.9 – 2.6.9
  2. Patched in2.6.9.1

Update to 2.6.9.1 or newer.

You are affected if you run 2.6.9 – 2.6.9. Version 2.6.9.1 and later are not affected by this issue.

WP Featured Content and Slider wp-featured-content-and-slider

  1. Affected1.7.6 – 1.7.6
  2. Patched in1.7.6.1

Update to 1.7.6.1 or newer.

You are affected if you run 1.7.6 – 1.7.6. Version 1.7.6.1 and later are not affected by this issue.

Post Ticker Ultimate ticker-ultimate

  1. Affected1.7.6 – 1.7.6
  2. Patched in1.7.6.1

Update to 1.7.6.1 or newer.

You are affected if you run 1.7.6 – 1.7.6. Version 1.7.6.1 and later are not affected by this issue.

Team Slider and Team Grid Showcase plus Team Carousel wp-team-showcase-and-slider

  1. Affected2.8.6 – 2.8.6
  2. Patched in2.8.6.1

Update to 2.8.6.1 or newer.

You are affected if you run 2.8.6 – 2.8.6. Version 2.8.6.1 and later are not affected by this issue.

Post grid and filter ultimate post-grid-and-filter-ultimate

  1. Affected1.7.4 – 1.7.4
  2. Patched in1.7.4.1

Update to 1.7.4.1 or newer.

You are affected if you run 1.7.4 – 1.7.4. Version 1.7.4.1 and later are not affected by this issue.

WP Blog and Widgets wp-blog-and-widgets

  1. Affected2.6.6 – 2.6.6
  2. Patched in2.6.6.1

Update to 2.6.6.1 or newer.

You are affected if you run 2.6.6 – 2.6.6. Version 2.6.6.1 and later are not affected by this issue.

Timeline and History slider timeline-and-history-slider

  1. Affected2.4.5 – 2.4.5
  2. Patched in2.4.5.1

Update to 2.4.5.1 or newer.

You are affected if you run 2.4.5 – 2.4.5. Version 2.4.5.1 and later are not affected by this issue.

WP responsive FAQ with category plugin sp-faq

  1. Affected3.9.5 – 3.9.5
  2. Patched in3.9.5.1

Update to 3.9.5.1 or newer.

You are affected if you run 3.9.5 – 3.9.5. Version 3.9.5.1 and later are not affected by this issue.

WP Responsive Recent Post Slider/Carousel wp-responsive-recent-post-slider

  1. Affected3.7.1 – 3.7.1
  2. Patched in3.7.1.1

Update to 3.7.1.1 or newer.

You are affected if you run 3.7.1 – 3.7.1. Version 3.7.1.1 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Popup Maker and Popup Anything – Popup for opt-ins and Lead Generation Conversions.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 2.9.1.1, or a newer patched version
  2. Update to version 1.5.7.1, or a newer patched version
  3. Update to version 1.5.6.1, or a newer patched version
  4. Update to version 1.4.6.1, or a newer patched version
  5. Update to version 2.8.7.1, or a newer patched version
  6. Update to version 3.5.6.1, or a newer patched version
  7. Update to version 3.7.8.2, or a newer patched version
  8. Update to version 3.8.7.1, or a newer patched version
  9. Update to version 2.1.8.1, or a newer patched version
  10. Update to version 2.0.8.1, or a newer patched version
  11. Update to version 2.7.7.1, or a newer patched version
  12. Update to version 5.0.6.1, or a newer patched version
  13. Update to version 1.8.6.1, or a newer patched version
  14. Update to version 2.6.9.1, or a newer patched version
  15. Update to version 1.7.6.1, or a newer patched version
  16. Update to version 1.7.6.1, or a newer patched version
  17. Update to version 2.8.6.1, or a newer patched version
  18. Update to version 1.7.4.1, or a newer patched version
  19. Update to version 2.6.6.1, or a newer patched version
  20. Update to version 2.4.5.1, or a newer patched version
  21. Update to version 3.9.5.1, or a newer patched version
  22. Update to version 3.7.1.1, or a newer patched version
  23. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  24. Watch Popup Maker and Popup Anything – Popup for opt-ins and Lead Generation Conversions to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Cooties, Damien.

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.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Popup Maker and Popup Anything – Popup for opt-ins and Lead Generation Conversions

All 6
More vulnerabilities in Popup Maker and Popup Anything – Popup for opt-ins and Lead Generation Conversions
SeverityVulnerabilityCVEPublished
Medium5.3Missing Authorization
≤2.8.0Update to 2.8.1
CVE-2024-32601
Medium5.3Missing Authorization to Notice Dismissal
≤2.7Update to 2.8
CVE-2023-40200
Medium4.3Cross Site Request Forgery
<2.2.2Update to 2.2.2
CVE-2022-38077
Medium6.1Reflected Cross-Site Scripting
≤2.1.6Update to 2.1.7
CVE-2022-2115
Medium5.4Contributor+ Stored Cross-Site Scripting
≤2.0.3Update to 2.0.4
CVE-2021-24883

Timeline

  1. CVE published

    Severity critical, CVSS 9.8

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
CVE® identifiers
[object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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