Vulnerability 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
Related Weaknesses (CWE)
References
- https://github.com/Maalfer/mailerup/commit/99eb6d4586134bf3f4422093fbf47d6794ef0
- https://secur0.com/en/cna/cve-list/cve-2026-13164-unauthenticated-self-registrat
FAQ
What is CVE-2026-13164?
CVE-2026-13164 is a documented vulnerability. 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 t...
How severe is CVE-2026-13164?
CVSS scoring is not yet available for CVE-2026-13164. Check NVD for updates.
Is there a patch for CVE-2026-13164?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.