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.
Advisories
No advisories yet.
Fixes
Solution
Upgrade to version 1.0.1 or higher.
Workaround
No workaround given by the vendor.
References
History
Wed, 24 Jun 2026 13:30:00 +0000
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| Metrics |
ssvc
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Wed, 24 Jun 2026 13:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Lack of input validation in Mailerup input parameter leads to Open Redirect | |
| First Time appeared |
Mailerup
Mailerup mailerup |
|
| Weaknesses | CWE-601 | |
| CPEs | cpe:2.3:a:mailerup:mailerup:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Mailerup
Mailerup mailerup |
|
| References |
| |
| Metrics |
cvssV4_0
|
Projects
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Status: PUBLISHED
Assigner: Secur0
Published:
Updated: 2026-06-24T13:07:07.003Z
Reserved: 2026-06-24T12:44:34.692Z
Link: CVE-2026-13163
Updated: 2026-06-24T13:07:01.543Z
No data.
No data.
OpenCVE Enrichment
No data.
Weaknesses