Missing Authentication for Critical Function (CWE-306) in the RegisterView (apps/accounts/views.py), exposed at POST /api/auth/register/, in MailerUp <1.0.1 allows a remote, unauthenticated attacker to self-register a working account on instances where registration is intended to be restricted, because the endpoint applies the AllowAny permission with no email verification, CAPTCHA, or administrator approval. Any account created this way can read all email stored by the instance, resulting in full disclosure of stored messages to an arbitrary unauthenticated attacker

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Advisories

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Fixes

Solution

Upgrade to version greater or equal than 1.0.1


Workaround

No workaround given by the vendor.

History

Wed, 24 Jun 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 24 Jun 2026 16:30:00 +0000

Type Values Removed Values Added
Description Missing Authentication for Critical Function (CWE-306) in the RegisterView (apps/accounts/views.py), exposed at POST /api/auth/register/, in MailerUp <1.0.1 allows a remote, unauthenticated attacker to self-register a working account on instances where registration is intended to be restricted, because the endpoint applies the AllowAny permission with no email verification, CAPTCHA, or administrator approval. Any account created this way can read all email stored by the instance, resulting in full disclosure of stored messages to an arbitrary unauthenticated attacker
Title Unauthenticated self-registration in MailerUp allows access to stored email data
First Time appeared Mailerup
Mailerup mailerup
Weaknesses CWE-306
CPEs cpe:2.3:a:mailerup:mailerup:*:*:*:*:*:*:*:*
Vendors & Products Mailerup
Mailerup mailerup
References
Metrics cvssV4_0

{'score': 8.8, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: Secur0

Published:

Updated: 2026-06-24T16:43:56.757Z

Reserved: 2026-06-24T12:50:14.906Z

Link: CVE-2026-13164

cve-icon Vulnrichment

Updated: 2026-06-24T16:43:43.433Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-24T21:30:04Z

Weaknesses