CVE-2024-32657Network attack vector

Stored XSS via unsandboxed HTML build artifacts

Published Apr 22, 2024 · Updated Aug 2, 2024

Stored XSS in NixOS Hydra before 23.11 allows remote authenticated users to execute scripts through crafted HTML build artifacts. The serveFile path in Build.pm returns regular build-output files without a sandboxing Content-Security-Policy, leaving HTML in Hydra's origin. A user must open the artifact; its script then runs in the browser context and can issue authenticated same-origin HTTP requests.

CVSS severity4.6
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in NixOS Hydra before 23.11 allows remote authenticated users to execute scripts through crafted HTML build artifacts. The serveFile path in Build.pm returns regular build-output files without a sandboxing Content-Security-Policy, leaving HTML in Hydra's origin. A user must open the artifact; its script then runs in the browser context and can issue authenticated same-origin HTTP requests.

The record

CVE
CVE-2024-32657
Published
Apr 22, 2024
Updated
Aug 2, 2024
Vendor
NixOS
Product
Hydra
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 22, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <23.11
  2. Affected versionversion=0 <b72528be5074f3e62e9ae2c2ae8ef9c07a0b4dd3
  3. Affected versionversion=< 23.11
  4. Affected versionversion=< b72528be5074f3e62e9ae2c2ae8ef9c07a0b4dd3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

NixOS · Hydraversion=0 <23.11; version=0 <b72528be5074f3e62e9ae2c2ae8ef9c07a0b4dd3; version=< 23.11; version=< b72528be5074f3e62e9ae2c2ae8ef9c07a0b4dd3

Published CVSS scores

4.6GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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