NVD / CVE Program· CNA Wordfence

CVE-2026-6443: Essentialplugin Plugins (Various Versions) - Injected Backdoor

Noroxi assessment

Priority: Monitor (action score 39/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.49% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
According to the record, no fixed version is available yet.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

CriticalCVSS 9.8 · v3.1—No exploit No fix recorded

Pre-auth

Published: Apr 17, 2026
Updated: Oct 26, 2026
EPSS: 0.4% · 42th percentile
CWE: CWE-506

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 39 / 40 · 9.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.4%

CISA SSVC decision

Exploitation: none
Automatable: yes
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · Wordfence: 9.8; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

ProductVersion

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Versions reported by the vendor

Affected version ranges reported by the assigning authority (Wordfence). Independent of NVD's CPE analysis and usually ahead of it.

essentialplugin Accordion and Accordion Slider
- 1.4.6affected
essentialplugin Album and Image Gallery Plus Lightbox
- 2.1.8affected
essentialplugin Blog Designer – Post and Widget
- 2.7.7affected
essentialplugin Countdown Timer Ultimate
- 2.6.9affected
essentialplugin Featured Post Creative
- 1.5.7affected
essentialplugin Meta Slider and Carousel with Lightbox
- 2.0.8affected
essentialplugin Popup Maker and Popup Anything – Popup for opt-ins and Lead Generation Conversions
- 2.9.1affected
essentialplugin Portfolio and Projects
- 1.5.6affected
essentialplugin Post grid and filter ultimate
- 1.7.4affected
essentialplugin Post Ticker Ultimate
- 1.7.6affected
essentialplugin Team Slider and Team Grid Showcase plus Team Carousel
- 2.8.6affected
essentialplugin Testimonial Grid and Testimonial Slider plus Carousel with Rotator Widget
- 3.5.6affected

Same product

essentialplugin: all records

Other highest-scoring records for the same primary product.

CVE-2026-0727Accordion and Accordion Slider <= 1.4.5 - Missing Authorization to Authenticated (Contributor+) Attachment Metadata Modification
21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Eu Joe Chegnefinder
Damienfinder

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).