CVE-2026-11592 icegram CVE debrief

Who should care

Defenders responsible for WordPress installations with the Email Subscribers & Newsletters plugin should assess exposure and prioritize verification of their systems, especially those with contributor-level access or higher.

Why it matters

CVE-2026-11592 is an authorization bypass vulnerability in the Email Subscribers & Newsletters plugin for WordPress. It allows authenticated attackers with contributor-level access and above to modify plugin settings, create audience lists, and dispatch mass email. Defenders should verify exposure, assess impact, and prioritize updates to prevent unauthorized actions.

• Verification of exposure and potential unauthorized modifications to plugin settings and audience lists.
• Assessment of impact on systems with contributor-level access or higher.
• Potential for unauthorized creation of newsletter broadcasts and post notifications.
• Possible disruption of email services due to unauthorized mass email dispatch.

Technical summary

The Email Subscribers & Newsletters plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 5.9.27. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with contributor-level access and above, to overwrite plugin mail settings (from name and from email address), create audience lists, insert arbitrary contacts into those lists, create and overwrite newsletter broadcasts and post notifications, add workflows, and queue and dispatch mass email to arbitrary recipients.

Defensive priority

Defenders should prioritize verifying exposure and assessing the impact of this vulnerability on their systems, especially those with contributor-level access or higher.

Recommended defensive actions

• Verify the version of the Email Subscribers & Newsletters plugin and update to a patched version if necessary.
• Restrict contributor-level access and above to only necessary users.
• Monitor for suspicious activity related to plugin mail settings and audience lists.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The Email Subscribers & Newsletters plugin for WordPress has an authorization bypass vulnerability in all versions up to and including 5.9.27. This allows authenticated attackers with contributor-level access and above to modify plugin mail settings, create audience lists, insert arbitrary contacts, create and overwrite newsletter broadcasts and post notifications, add workflows, and queue and dispatch mass email to arbitrary recipients. The vulnerability is due to improper authorization checks in the plugin. This allows for actions.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.