EUVD-2025-209233
GHSA-j58g-5hhr-9qhv
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Lifecycle Timeline
3Tags
Description
An open redirect in Ascertia SigningHub User v10.0 allows attackers to redirect users to a malicious site via a crafted URL.
Analysis
Open redirect in Ascertia SigningHub User v10.0 allows unauthenticated remote attackers to redirect users to attacker-controlled websites via crafted URLs, enabling phishing and credential harvesting attacks. The vulnerability requires user interaction (UI:R) to trigger but affects users across security domains (S:C), with CVSS 6.1 (Medium) and no confirmed active exploitation or public exploit code identified at time of analysis.
Technical Context
This vulnerability exploits improper input validation in URL handling mechanisms, classified as CWE-601 (URL Redirection to Untrusted Site). Ascertia SigningHub User v10.0 fails to validate or sanitize redirect parameters in application URLs, permitting attackers to craft URLs with attacker-controlled destination parameters. When users click such links-typically distributed via phishing emails or social engineering-the application redirects them to malicious sites without warning or validation. This is a common vulnerability in web applications and browser-based tools that accept user-supplied redirect targets without strict allowlisting or validation against a known-safe domain list.
Affected Products
Ascertia SigningHub User v10.0 is confirmed affected. CPE designation in source data shows generic placeholders (cpe:2.3:a:n/a:n/a) rather than vendor-specific identifiers, suggesting incomplete vendor data at time of CVE publication. ENISA EUVD-2025-209233 similarly lists affected version as 'n/a n/a', indicating missing structured vendor version metadata. Organizations running SigningHub User v10.0 should verify applicability; upstream and downstream version vulnerability status is not confirmed from available data.
Remediation
Vendor patch information and specific remediated version numbers are not provided in available source data. Organizations should contact Ascertia directly via their security advisory channels or check the vendor's website for patched versions of SigningHub User. As an interim mitigation, educate users to verify redirect destinations before clicking embedded links in emails, restrict application redirect parameters to allowlisted internal domains, and implement URL filtering at the email gateway to block suspicious redirect attempts. Disable or restrict any non-essential redirect functionality if configuration options permit.
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External POC / Exploit Code
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