Home

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

PUBLISHED Reserved 2026-06-24 | Published 2026-06-24 | Updated 2026-06-24 | Assigner Secur0




HIGH: 8.8CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-306 Missing authentication for critical function

Product status

Default status
unaffected

Any version before 1.0.1
affected

Credits

Dario Rivas Quero finder

Cristian Fernandez Cornejo finder

Mario Alvarez Fernandez remediation developer

Xoan M. Otero Jorge analyst

Secur0 CNA coordinator

References

github.com/...ommit/99eb6d4586134bf3f4422093fbf47d6794ef0ee5 patch

secur0.com/...in-mailerup-allows-access-to-stored-email-data technical-description related

cve.org (CVE-2026-13164)

nvd.nist.gov (CVE-2026-13164)

Download JSON