CVE-2026-14834Public exploitNetwork attack vector

Unauthenticated list subscription via unchecked AJAX action

Published Jul 31, 2026 · Updated Jul 31, 2026

Improper access control in Mailgun for WordPress before 2.2.1 allows remote attackers to add arbitrary addresses via a public AJAX request. The add_list handler accepts name, email, and list-address fields without a nonce or capability check, then uses the site's stored API key to create Mailgun list members. Exploitation requires an active, API-configured plugin and a known or guessable list address; it changes list membership but does not grant WordPress access.

CVSS severity6.5
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Mailgun for WordPress before 2.2.1 allows remote attackers to add arbitrary addresses via a public AJAX request. The add_list handler accepts name, email, and list-address fields without a nonce or capability check, then uses the site's stored API key to create Mailgun list members. Exploitation requires an active, API-configured plugin and a known or guessable list address; it changes list membership but does not grant WordPress access.

The record

CVE
CVE-2026-14834
Published
Jul 31, 2026
Updated
Jul 31, 2026
Vendor
Mailgun
Product
Mailgun for WordPress
Classifications
CWE-284, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 31, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mailgun · Mailgun for WordPressversion=0 <2.2.1

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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