CVE-2025-61594

URI Credential Leakage Bypass over CVE-2025-27221

Upgrade to 0.12.5, 0.13.3 or 1.0.4

References

• https://www.ruby-lang.org/en/news/2025/02/26/security-advisories/
• https://hackerone.com/reports/2957667

In affected URI version, a bypass exists for the fix to CVE-2025-27221 that can expose user credentials.

When using the + operator to combine URIs, sensitive information like passwords from the original URI can be leaked, violating RFC3986 and making applications vulnerable to credential exposure.

The vulnerability affects the uri gem bundled with the following Ruby series:

• 0.12.4 and earlier (bundled in Ruby 3.2 series)
• 0.13.2 and earlier (bundled in Ruby 3.3 series)
• 1.0.3 and earlier (bundled in Ruby 3.4 series)

CVE-2025-61594 has a CVSS score of 7.5 (Low). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (0.12.5, 0.13.3, 1.0.4); upgrading removes the vulnerable code path.

Kodem intelligence

Already deployed Kodem?

1. What is CVE-2025-61594? CVE-2025-61594 is a low-severity security vulnerability in uri (rubygems), affecting versions < 0.12.5. It is fixed in 0.12.5, 0.13.3, 1.0.4.
2. How severe is CVE-2025-61594? CVE-2025-61594 has a CVSS score of 7.5 (Low). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of uri are affected by CVE-2025-61594? uri (rubygems) versions < 0.12.5 is affected.
4. Is there a fix for CVE-2025-61594? Yes. CVE-2025-61594 is fixed in 0.12.5, 0.13.3, 1.0.4. Upgrade to this version or later.
5. Is CVE-2025-61594 exploitable, and should I be worried? Whether CVE-2025-61594 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
6. What actually determines whether CVE-2025-61594 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.
7. How do I fix CVE-2025-61594?
   • Upgrade uri to 0.12.5 or later
   • Upgrade uri to 0.13.3 or later
   • Upgrade uri to 1.0.4 or later

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