Vulnerability in Essentialplugin Accordion And Slider
CVE-2026-6443
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (48.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.002
Affected products
- Essentialplugin Accordion And Slider — versions 1.4.6
- Essentialplugin Album And Image Gallery Plus Lightbox — versions 2.1.8
- Essentialplugin Blog Designer – Post And Widget — versions 2.7.7
- Essentialplugin Countdown Timer Ultimate — versions 2.6.9
- Essentialplugin Featured Post Creative — versions 1.5.7
- Essentialplugin Meta Slider And Carousel With Lightbox — versions 2.0.8
- Essentialplugin Popup Maker And Anything – For Opt-Ins Lead Generation Conversions — versions 2.9.1
- Essentialplugin Portfolio And Projects — versions 1.5.6
- Essentialplugin Post Grid And Filter Ultimate — versions 1.7.4
- Essentialplugin Post Ticker Ultimate — versions 1.7.6
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-6443?
- CVE-2026-6443 is a critical-severity vulnerability in Essentialplugin Accordion And Slider, classified under CWE-506. CVSS score: 9.8/10. Published 2026-04-17.
- How severe is CVE-2026-6443?
- Critical severity. CVSS v3 base score is 9.8 out of 10.