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CVE-2025-54800— Hydra persistent XSS in build metrics

Quick assessment

Affected
NixOS hydra
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Hydra是Nix开源的一个基于Nix项目的持续集成服务。 Hydra dea1e16之前版本存在跨站脚本漏洞，该漏洞源于恶意包可注入任意JavaScript代码，可能导致跨站脚本攻击。

AI Predicted 6.1 Difficulty: Moderate EPSS 0.20% · P9
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I. Basic Information for CVE-2025-54800

Vulnerability Information
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Vulnerability Title
Hydra persistent XSS in build metrics
Source: CVE Program / CVE List V5
Vulnerability Description
Hydra is a continuous integration service for Nix based projects. Prior to commit dea1e16, a malicious package can introduce arbitrary JavaScript code into the Hydra database that is automatically evaluated in a client's browser when anyone visits the build page. This could be done by a third-party project as part of its build process. This also happens in other places like with hydra-release-name. This issue has been patched by commit dea1e16. A workaround involves either not building untrusted packages or not visiting the builds page.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Hydra 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hydra是Nix开源的一个基于Nix项目的持续集成服务。 Hydra dea1e16之前版本存在跨站脚本漏洞，该漏洞源于恶意包可注入任意JavaScript代码，可能导致跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
NixOS hydra < dea1e168f590efb27db32dbacc82b09e15f8ae4b -

II. Public POCs for CVE-2025-54800

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III. Intelligence Information for CVE-2025-54800

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IV. Related Vulnerabilities

Same product: hydra
Same vendor: NixOS
Same weakness: CWE-79

V. Comments for CVE-2025-54800

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