Summary
redirect_url is treated as safe when url.Parse(...).IsAbs() is false. Protocol-relative URLs like //ikotaslabs.com have an empty scheme and pass that check, allowing post-login redirects to attacker-controlled sites.
Details
url.Parse("//ikotaslabs.com")=> empty Scheme, Host="ikotaslabs.com".IsAbs()returns false for//ikotaslabs.com, so the code treats it as allowed.- Browser resolves
//ikotaslabs.comto current-origin scheme (e.g.https://ikotaslabs.com), enabling phishing flows after login.
PoC
- Send or visit:
http://localhost/login?redirect_url=//ikotaslabs.com - Complete normal login flow.
- After login the app redirects to
https://ikotaslabs.com(orhttp://depending on origin).
Acknowledgements
This vulnerability was discovered using the automated vulnerability analysis tools VulScribe and PwnML. The research and tool development were conducted with support from the MITOU Advanced Program (未踏アドバンスト事業), implemented by the Information-technology Promotion Agency (IPA), Japan.
Impact
Untrusted input controls a URL used for redirection, which can forward users to attacker-controlled sites. Typical impact: phishing and credential harvesting via a trusted domain.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
Remediation advice
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
Frequently Asked Questions
- What is CVE-2025-67713? CVE-2025-67713 is a medium-severity open redirect vulnerability in miniflux.app/v2 (go), affecting versions <= 2.2.14. It is fixed in 2.2.15. Untrusted input controls a URL used for redirection, which can forward users to attacker-controlled sites.
- Which versions of miniflux.app/v2 are affected by CVE-2025-67713? miniflux.app/v2 (go) versions <= 2.2.14 is affected.
- Is there a fix for CVE-2025-67713? Yes. CVE-2025-67713 is fixed in 2.2.15. Upgrade to this version or later.
- Is CVE-2025-67713 exploitable, and should I be worried? Whether CVE-2025-67713 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2025-67713 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2025-67713? Upgrade
miniflux.app/v2to 2.2.15 or later.