CVE-2026-6443 Essentialplugin Plugins (Various Versions) - Injected Backdoor
A malicious actor embedded backdoors in multiple Essentialplugin WordPress plugins, allowing persistent access and spam injection on affected sites.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-6443?
CVE-2026-6443 is a critical vulnerability in essentialplugin Accordion and Accordion Slider, published on 17 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-506
Which versions are affected by CVE-2026-6443?
How do I fix CVE-2026-6443?
No fix has been published for CVE-2026-6443 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-6443 being exploited?
There is no known exploitation of CVE-2026-6443 in the wild and no public exploit code.
Sources
Also known as GHSA-c8jg-hc58-jrx2.