URI Credential Leakage Bypass over CVE-2025-27221
### Impact 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) ### Patches 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
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2025-61594US | high7.5 | — | ||
URI is a module providing classes to handle Uniform Resource Identifiers. In versions 0.12.4 and earlier (bundled in Ruby 3.2 series) 0.13.2 and earlier (bundled in Ruby 3.3 series… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/advisories/GHSA-22h5-pq3x-2gf2ADVISORY
- https://github.com/ruby/uriPACKAGE
- https://github.com/ruby/uri/commit/20157e3e29b125ff41f1d9662e2e3b1d066f5902WEB
- https://github.com/ruby/uri/commit/7e521b2da0833d964aab43019e735aea674e1c2cWEB
- https://github.com/ruby/uri/commit/d3116ca66a3b1c97dc7577f9d2d6e353f391cd6aWEB
- https://github.com/ruby/uri/security/advisories/GHSA-j4pr-3wm6-xx2rWEB
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/uri/CVE-2025-61594.ymlWEB
- https://hackerone.com/reports/2957667WEB
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