PT-2026-51787 · Mailerup · Mailerup
Secur0 Cna
·
Published
2026-06-24
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Updated
2026-06-24
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CVE-2026-13163
CVSS v4.0
5.3
Medium
| Vector | AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N |
Open redirect vulnerability (CWE-601) in the safe redirect function of the click-tracking endpoint (/c//) 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.
Fix
Open Redirect
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Weakness Enumeration
Related Identifiers
Affected Products
Mailerup