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2 vulnerabilities by Mailerup
CVE-2026-13164 (GCVE-0-2026-13164)
Vulnerability from cvelistv5 – Published: 2026-06-24 15:37 – Updated: 2026-06-24 16:43
VLAI
Title
Unauthenticated self-registration in MailerUp allows access to stored email data
Summary
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
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-306 - Missing authentication for critical function
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/Maalfer/mailerup/commit/99eb6d… | patch |
| https://secur0.com/en/cna/cve-list/cve-2026-13164… | technical-descriptionrelated |
Credits
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CVE-2026-13163 (GCVE-0-2026-13163)
Vulnerability from cvelistv5 – Published: 2026-06-24 12:49 – Updated: 2026-06-24 13:07
VLAI
Title
Lack of input validation in Mailerup input parameter leads to Open Redirect
Summary
Open redirect vulnerability (CWE-601) in the _safe_redirect function of the click-tracking endpoint (/c/<token>/) in Mailerup <1.0.0 on all platforms allows remote unauthenticated attackers to redirect victims to arbitrary external sites and conduct phishing attacks via a crafted u query parameter, because the URL scheme is validated (blocking javascript: and data:) but the destination host is not restricted to an allowlist, and a signing.BadSignature exception is silently caught so a valid signed token is not required.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-601 - URL redirection to untrusted site ('open redirect')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/Maalfer/mailerup/commit/99eb6d… | patch |
Date Public
2026-06-24 12:40
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