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GHSA-wqv2-4wpg-8hc9

Miniflux has an Open Redirect via protocol-relative redirect_url

Also known asCVE-2025-67713GO-2025-4226
Published
Dec 10, 2025
Updated
Feb 3, 2026
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed

EPSS Exploitation Probability

via FIRST.org ↗
0.2%probability of exploitation in next 30 days
Lower Risk8th percentile+0.14%
0.00%0.23%0.46%0.68%0.1%0.2%Jan 26Apr 26Jun 26

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Blast Radius

1 pkg affected
🐹miniflux.app/v2

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

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.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐹Gominiflux.app/v2all versions2.2.15

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for miniflux.app/v2. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update miniflux.app/v2 to 2.2.15 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-wqv2-4wpg-8hc9 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether GHSA-wqv2-4wpg-8hc9 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-wqv2-4wpg-8hc9. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

### 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_u
O3 Security · Impact-Aware SCA

Is GHSA-wqv2-4wpg-8hc9 in your dependencies?

O3 detects GHSA-wqv2-4wpg-8hc9 across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.