Reported vulnerability
Essentialplugin Plugins (Various Versions) - Injected Backdoor
Published 9 Apr 2026
Updated 21 Apr 2026
CVE-2026-6443
Compare your installed software with the affected versions below. Follow the source’s remediation guidance and test an available update after taking a backup. A database entry describes a reported issue; it does not establish whether a particular website has been compromised.
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Check your installed version against this advisory. This compares the report’s version ranges and does not scan your website.
Wordfence advisory
critical · CVSS 9.8All 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.
Severity vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Portfolio and Projects
- Software
- plugin · portfolio-and-projects
- Affected versions
- From 1.5.6, through 1.5.6
- Fix availability
- Fix available
- Fixed versions
- 1.5.6.1
Recommended action
Update to version 1.5.6.1, or a newer patched version
Video gallery and Player
- Software
- plugin · html5-videogallery-plus-player
- Affected versions
- From 2.8.7, through 2.8.7
- Fix availability
- Fix available
- Fixed versions
- 2.8.7.1
Recommended action
Update to version 2.8.7.1, or a newer patched version
Testimonial Grid and Testimonial Slider plus Carousel with Rotator Widget
- Software
- plugin · wp-testimonial-with-widget
- Affected versions
- From 3.5.6, through 3.5.6
- Fix availability
- Fix available
- Fixed versions
- 3.5.6.1
Recommended action
Update to version 3.5.6.1, or a newer patched version
WP Slick Slider and Image Carousel
- Software
- plugin · wp-slick-slider-and-image-carousel
- Affected versions
- From 3.7.8.1, through 3.7.8.1
- Fix availability
- Fix available
- Fixed versions
- 3.7.8.2
Recommended action
Update to version 3.7.8.2, or a newer patched version
Accordion and Accordion Slider
- Software
- plugin · accordion-and-accordion-slider
- Affected versions
- From 1.4.6, through 1.4.6
- Fix availability
- Fix available
- Fixed versions
- 1.4.6.1
Recommended action
Update to version 1.4.6.1, or a newer patched version
WP Logo Showcase Responsive Slider and Carousel
- Software
- plugin · wp-logo-showcase-responsive-slider-slider
- Affected versions
- From 3.8.7, through 3.8.7
- Fix availability
- Fix available
- Fixed versions
- 3.8.7.1
Recommended action
Update to version 3.8.7.1, or a newer patched version
Album and Image Gallery Plus Lightbox
- Software
- plugin · album-and-image-gallery-plus-lightbox
- Affected versions
- From 2.1.8, through 2.1.8
- Fix availability
- Fix available
- Fixed versions
- 2.1.8.1
Recommended action
Update to version 2.1.8.1, or a newer patched version
Meta Slider and Carousel with Lightbox
- Software
- plugin · meta-slider-and-carousel-with-lightbox
- Affected versions
- From 2.0.8, through 2.0.8
- Fix availability
- Fix available
- Fixed versions
- 2.0.8.1
Recommended action
Update to version 2.0.8.1, or a newer patched version
Blog Designer – Post and Widget
- Software
- plugin · blog-designer-for-post-and-widget
- Affected versions
- From 2.7.7, through 2.7.7
- Fix availability
- Fix available
- Fixed versions
- 2.7.7.1
Recommended action
Update to version 2.7.7.1, or a newer patched version
WP News and Scrolling Widgets
- Software
- plugin · sp-news-and-widget
- Affected versions
- From 5.0.6, through 5.0.6
- Fix availability
- Fix available
- Fixed versions
- 5.0.6.1
Recommended action
Update to version 5.0.6.1, or a newer patched version
Trending/Popular Post Slider and Widget
- Software
- plugin · wp-trending-post-slider-and-widget
- Affected versions
- From 1.8.6, through 1.8.6
- Fix availability
- Fix available
- Fixed versions
- 1.8.6.1
Recommended action
Update to version 1.8.6.1, or a newer patched version
Countdown Timer Ultimate
- Software
- plugin · countdown-timer-ultimate
- Affected versions
- From 2.6.9, through 2.6.9
- Fix availability
- Fix available
- Fixed versions
- 2.6.9.1
Recommended action
Update to version 2.6.9.1, or a newer patched version
WP Featured Content and Slider
- Software
- plugin · wp-featured-content-and-slider
- Affected versions
- From 1.7.6, through 1.7.6
- Fix availability
- Fix available
- Fixed versions
- 1.7.6.1
Recommended action
Update to version 1.7.6.1, or a newer patched version
Post Ticker Ultimate
- Software
- plugin · ticker-ultimate
- Affected versions
- From 1.7.6, through 1.7.6
- Fix availability
- Fix available
- Fixed versions
- 1.7.6.1
Recommended action
Update to version 1.7.6.1, or a newer patched version
Team Slider and Team Grid Showcase plus Team Carousel
- Software
- plugin · wp-team-showcase-and-slider
- Affected versions
- From 2.8.6, through 2.8.6
- Fix availability
- Fix available
- Fixed versions
- 2.8.6.1
Recommended action
Update to version 2.8.6.1, or a newer patched version
Post grid and filter ultimate
- Software
- plugin · post-grid-and-filter-ultimate
- Affected versions
- From 1.7.4, through 1.7.4
- Fix availability
- Fix available
- Fixed versions
- 1.7.4.1
Recommended action
Update to version 1.7.4.1, or a newer patched version
WP Blog and Widgets
- Software
- plugin · wp-blog-and-widgets
- Affected versions
- From 2.6.6, through 2.6.6
- Fix availability
- Fix available
- Fixed versions
- 2.6.6.1
Recommended action
Update to version 2.6.6.1, or a newer patched version
Featured Post Creative
- Software
- plugin · featured-post-creative
- Affected versions
- From 1.5.7, through 1.5.7
- Fix availability
- Fix available
- Fixed versions
- 1.5.7.1
Recommended action
Update to version 1.5.7.1, or a newer patched version
Timeline and History slider
- Software
- plugin · timeline-and-history-slider
- Affected versions
- From 2.4.5, through 2.4.5
- Fix availability
- Fix available
- Fixed versions
- 2.4.5.1
Recommended action
Update to version 2.4.5.1, or a newer patched version
Popup Maker and Popup Anything – Popup for opt-ins and Lead Generation Conversions
- Software
- plugin · popup-anything-on-click
- Affected versions
- From 2.9.1, through 2.9.1
- Fix availability
- Fix available
- Fixed versions
- 2.9.1.1
Recommended action
Update to version 2.9.1.1, or a newer patched version
WP responsive FAQ with category plugin
- Software
- plugin · sp-faq
- Affected versions
- From 3.9.5, through 3.9.5
- Fix availability
- Fix available
- Fixed versions
- 3.9.5.1
Recommended action
Update to version 3.9.5.1, or a newer patched version
WP Responsive Recent Post Slider/Carousel
- Software
- plugin · wp-responsive-recent-post-slider
- Affected versions
- From 3.7.1, through 3.7.1
- Fix availability
- Fix available
- Fixed versions
- 3.7.1.1
Recommended action
Update to version 3.7.1.1, or a newer patched version
Further references (1)
Data sources and licences
Copyright 2012-2026 Defiant Inc.
Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.
Read licence termsCopyright 1999-2026 The MITRE Corporation
CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.
Read licence termsSource: Wordfence
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How do I check which product and version this report affects?
This report covers more than one product. Choose your plugin, theme or WordPress core in the version checker, then enter its installed version. Each product has its own affected ranges and fix details in the report above.
Which update should I install?
Find your exact product in the report and read its fixed versions and recommended action. Fix details for one product do not apply to every product covered by this advisory. Follow the linked source when no fixed version is specified.
Does an affected version mean my website has been hacked?
An affected version means the installed release matches a vulnerability described in this report. It does not show whether anyone has exploited it on your website. The checker compares version numbers with stored reports; it does not inspect your website.
Does a version outside these ranges mean my website is secure?
A version outside the reported ranges is not listed as affected by this particular issue. Other vulnerabilities, missing information or a previous compromise still need separate checks. Review other reports for your product and keep your website maintained.
Other reports for the same product
These reports cover at least one of the same plugins, themes or WordPress core. Check each report’s affected versions separately.
- Album and Image Gallery Plus Lightbox <= 2.1.7 - Authenticated (Contributor+) Stored Cross-Site Scripting via Plugin's ShortcodeUpdated 19 Feb 2026
- Accordion and Accordion Slider <= 1.4.5 - Missing Authorization to Authenticated (Contributor+) Attachment Metadata ModificationUpdated 14 Feb 2026
- Portfolio and Projects <= 1.5.5 - Authenticated (Contributor+) Information ExposureUpdated 11 Dec 2025
- Featured Post Creative <= 1.5.5 - Missing AuthorizationUpdated 1 Dec 2025
- Meta slider and carousel with lightbox <= 2.0.1 - Authenticated (Author+) Stored Cross-Site ScriptingUpdated 2 Oct 2024