Email Subscribers & Newsletters <= 5.9.27 - Missing Authorization to Authenticated (Contributor+) Settings Modification via ig_es_handle_request AJAX Action

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Summary

CVECVE-2026-11592
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-02 06:16:13 UTC
Updated2026-07-02 13:58:56 UTC
DescriptionThe Email Subscribers & Newsletters – Email Marketing, Post Notifications & Newsletter Plugin for WordPress 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.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from [email protected]

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

EPSS: 0.002720000 probability, percentile 0.189970000 (date 2026-07-04)

Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Icegram Email Subscribers Newsletters Email Marketing Post Notifications Newsletter Plugin For WordPress affected 5.9.27 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/email-subscribers/tags/5.9.24/lite/includes/class-ema... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/email-subscribers/tags/5.9.21/lite/includes/classes/c... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/email-subscribers/tags/5.9.21/lite/admin/class-ig-es-... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/email-subscribers/tags/5.9.24/lite/includes/classes/c... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/email-subscribers/tags/5.9.24/lite/includes/workflows... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/email-subscribers/tags/5.9.24/lite/admin/class-ig-es-... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/email-subscribers/tags/5.9.21/lite/includes/workflows... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/email-subscribers/tags/5.9.21/lite/admin/class-email-... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/email-subscribers/tags/5.9.21/lite/includes/class-ema... [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/a2e70691-4de9-4b12-babf-bebe2... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/email-subscribers/tags/5.9.24/lite/admin/class-email-... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Dmitrii Ignatyev (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-06-08T14:08:40.000ZVendor Notified
CNA2026-07-01T17:17:38.000ZDisclosed
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