What’s Vulnerable › Vulnerabilities
CVE-2025-30210: Bruno XSS On Environment Name
- Severity: medium (CVSS 6.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2025-04-01 · updated 2026-06-17
- Weakness: CWE-80
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.
Affected products
- usebruno bruno: before 1.39.1 — fixed in 1.39.1
How to fix
Upgrade to a fixed version: usebruno bruno 1.39.1. Check the vendor advisory for mitigations.
References
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