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GHSA-wqv2-4wpg-8hc9

MediumCVSS 5.3 / 10
Published Dec 10, 2025·Last modified Feb 3, 2026
Affected Components(1)
Go logominiflux.app/v2
< 2.2.15
Description

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.com to current-origin scheme (e.g. https://ikotaslabs.com), enabling phishing flows after login.

PoC

  1. Send or visit: http://localhost/login?redirect_url=//ikotaslabs.com
  2. Complete normal login flow.
  3. After login the app redirects to https://ikotaslabs.com (or http:// 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.

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Risk Scores
Base Score
5.3

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights.

Threat Intelligence
1.3

Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.

EPSS
0.22%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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