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Reflected XSS on releases.nixos.org and channels.nixos.org

Moderate
LeSuisse published GHSA-3xg5-p8ch-832g Sep 12, 2025

Package

No package listed

Affected versions

before ecf874a0826fcbc259b1b47a8f4ee23d28154550

Patched versions

since ecf874a0826fcbc259b1b47a8f4ee23d28154550

Description

Impact

A cross-site scripting (XSS) vulnerability can be exploited on the releases.nixos.org and channels.nixos.org domains through a specially crafted URL.

Proof of concept provided by the initial reporter

The XSS vulnerability can be triggered via the prefix parameter: https://releases.nixos.org/?prefix=%3Cimg%20src=a%20onerror=alert(document.location)%3E

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality
None
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N

CVE ID

No known CVE

Weaknesses

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Learn more on MITRE.

Credits