CVE-2025-27221

LOW

URI gem < 0.11.3 - Authentication Credential Leakage via URI Handling Methods

Title source: llm

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.

References (4)

Core 4

Core References

Mailing List

https://lists.debian.org/debian-lts-announce/2025/03/msg00008.html

Mailing List

https://lists.debian.org/debian-lts-announce/2025/05/msg00015.html

Third Party Advisory

https://github.com/rubysec/ruby-advisory-db/blob/master/gems/uri/CVE-2025-27221.yml

View Writeup ZIP pw:eip

Permissions Required

https://hackerone.com/reports/2957667

Scores

CVSS v3 3.2

EPSS 0.0047

EPSS Percentile 37.0%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-212

Status published

Products (2)

ruby-lang/uri < 0.11.3

rubygems/uri 0 - 0.11.3RubyGems

Published Mar 04, 2025

Tracked Since Feb 18, 2026