CVE-2025-27221

MEDIUM

5.3

CVSS Score

Published: March 3, 2025 at 12:00 AM UTC

Updated: June 17, 2026 at 09:03 AM UTC

2 products affected across 1 vendorUriURI

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Severity

MEDIUM5.3

Exploit prediction

EPSS 0.5%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Uri · Ruby Langrubygems

95%

v < 0.11.30.12.0 ≤ v < 0.12.40.13.0 ≤ v < 0.13.21.0.0 ≤ v < 1.0.3

Affected range stops below 0.11.3, so it looks safe — our inference, not a vendor statement

Affected range stops below 0.12.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 0.13.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.0.3, so it looks safe — our inference, not a vendor statement

URI · Ruby Lang

60%

v < 0.11.30.12.0 ≤ v < 0.12.40.13.0 ≤ v < 0.13.21.0.0 ≤ v < 1.0.30.12.0 0.13.0 1.0.0

Affected range stops below 0.11.3, so it looks safe — our inference, not a vendor statement

Affected range stops below 0.12.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 0.13.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.0.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (4)

Third Party Advisory

Source: [email protected]

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

Permissions Required

Source: [email protected]

https://hackerone.com/reports/2957667

Source: af854a3a-2127-422b-91ae-364da2661108

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

Source: af854a3a-2127-422b-91ae-364da2661108

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUM[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: LOW
Integrity: NONE
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-212

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