EUVD-2026-30338
GHSA-8fp2-92vw-8cpc
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Lifecycle Timeline
2DescriptionCVE.org
CWE-601 URL redirection to untrusted site ('open redirect')
AnalysisAI
Open redirect vulnerability in ntopng allows remote attackers to redirect users to arbitrary external websites via a crafted URL parameter. The vulnerability requires user interaction (clicking a malicious link) but affects all versions of ntopng with no authentication barrier, exposing users to phishing and credential harvesting attacks when they trust the legitimacy of the ntopng domain.
Technical ContextAI
ntopng is a network traffic analysis and monitoring tool that provides a web-based interface. CWE-601 (URL Redirection to Untrusted Site) occurs when user-supplied input is used to construct redirect responses without proper validation against a whitelist of safe destinations. This typically manifests in redirect parameters, referrer handling, or post-login redirect URLs. The vulnerability affects all versions of ntopng (CPE: cpe:2.3:a:ntop:ntopng:*:*:*:*:*:*:*:*) as no version constraint is specified, suggesting the issue may be systemic across the codebase.
RemediationAI
Upgrade ntopng to the latest available version from the ntop project; exact patch version is not specified in available data, so consult the ntop security advisories or GitHub releases page (https://github.com/ntop/ntopng) for the fix. Interim mitigations include: (1) Deploy a web application firewall (WAF) rule to block or log redirect parameters pointing to off-domain URLs, with trade-off of possible false positives on legitimate redirect use cases; (2) Educate users that ntopng redirects should stay within the ntopng domain and report suspicious redirects; (3) Restrict ntopng access to internal networks only via firewall rules to reduce external user exposure. None of these mitigations eliminate the vulnerability, and patching is the definitive fix once available.
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External POC / Exploit Code
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