CVE-2026-18437Network attack vector

Unauthenticated contact updates via unchecked REST endpoint

Published Jul 31, 2026 · Updated Jul 31, 2026

Missing authorization in MailerPress 1.5.0 and earlier allows remote attackers to update contact details through its REST API. The mailerpress/v1/contact endpoint accepts contact-update requests without a capability check, so it performs writes for unauthenticated callers. No account or user interaction is required; the demonstrated consequence is limited to modifying stored contact details.

CVSS severity5.3
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in MailerPress 1.5.0 and earlier allows remote attackers to update contact details through its REST API. The mailerpress/v1/contact endpoint accepts contact-update requests without a capability check, so it performs writes for unauthenticated callers. No account or user interaction is required; the demonstrated consequence is limited to modifying stored contact details.

The record

CVE
CVE-2026-18437
Published
Jul 31, 2026
Updated
Jul 31, 2026
Vendor
MailerPress
Product
MailerPress
Classifications
CWE-862, 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 <=1.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MailerPress · MailerPressversion=0 <=1.5.0

Published CVSS scores

5.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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