Email Subscribers permits unauthenticated shortcode execution

Email Subscribers through 5.9.27 passes an attacker-controlled value to do_shortcode without adequate validation. An unauthenticated attacker can execute any shortcode registered on the site, with the resulting data exposure or state change determined by the available shortcodes.

CVE / CNA score 6.5 CVSS 3.1 · security@wordfence.com

NVD score Pending NVD has not published its own CVSS assessment.

Component: Email Subscribers & Newsletters – Email Marketing, Post Notifications & Newsletter Plugin for WordPress
Plugin slug: email-subscribers
Affected: <= 5.9.27
Safe version: See mitigation notes
Published: Sep 07, 2026
Weakness: CWE-94 — Improper Control of Generation of Code ('Code Injection')

This CVE was published Sep 07, 2026 and is one of 22 known issues for this plugin.

What to do

Update, patch or deactivate.

No confirmed fixed release is identified. Obtain a vendor-confirmed patch or disable the affected public subscription workflow, then review exposed shortcodes for actions or data available to unauthenticated visitors.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

The The Email Subscribers & Newsletters – Email Marketing, Post Notifications & Newsletter Plugin for WordPress plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 5.9.27. This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

References

Primary and upstream sources

Data attribution: This product uses the NVD API but is not endorsed or certified by the NVD.

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