Authentication Credential Leakage in Ruby URI Gem
CVE-2025-27221

5.3MEDIUM

Key Information:

Vendor

Ruby-lang

Status
Uri
Vendor
CVE Published:
4 March 2025

What is CVE-2025-27221?

The URI gem for Ruby, prior to version 1.0.3, exhibits a critical issue where authentication credentials can inadvertently leak due to improper handling during host changes. Specifically, methods such as URI.join, URI#merge, and URI#+ retain user information even after the host has been altered, potentially exposing sensitive data to unauthorized parties. Developers utilizing this gem should review their implementation to mitigate risks associated with this vulnerability.

Affected Version(s)

URI 0 < 0.11.3

URI 0.12.0 < 0.12.4

URI 0.13.0 < 0.13.2

References

https://hackerone.com/reports/2957667
https://github.com/rubysec/ruby-advisory-db/blob/master/g...

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

.