CVEvulnerability
CVE-2026-13163
5.3 MEDIUM
Official page ↗
- Status
- Deferred
- Published
- 2026-06-24
- Last modified
- 2026-10-24
- Assigner
- 4daa8cea-433a-44bd-9456-53b127fc289a
- CVSS 4.0 (4daa8cea-433a-44bd-9456-53b127fc289a)
- 5.3 MEDIUM — CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Weaknesses
- CWE-601
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.
Related
Weakness · CWE (1)
- CWE-601 URL Redirection to Untrusted Site weakness