CVE-2025-27221

Description

In the URI gem before 1.0.3 for Ruby, the URI handling methods (URI.join, URI#merge, URI#+) have an inadvertent leakage of authentication credentials because userinfo is retained even after changing the host.

Category

3.2
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.02%
Third-Party Advisory github.com
Affected: ruby-lang URI
Published at:
Updated at:

References

Link Tags
https://hackerone.com/reports/2957667 permissions required
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/uri/CVE-2025-27221.yml third party advisory

Frequently Asked Questions

What is the severity of CVE-2025-27221?
CVE-2025-27221 has been scored as a low severity vulnerability.
How to fix CVE-2025-27221?
To fix CVE-2025-27221, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-27221 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-27221 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-27221?
CVE-2025-27221 affects ruby-lang URI.
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