CVE-2026-6443: Essentialplugin Accordion And Accordion Slider

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

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

Published 2026-04-17. Last modified 2026-06-17.