CVE-2025-30210 Bruno XSS On Environment Name
Attackers can execute arbitrary scripts via malicious environment names in imported collections, requiring user interaction to trigger.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-30210?
CVE-2025-30210 is a high-severity cross-site scripting vulnerability in usebruno bruno, published on 1 Apr 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-80
Which versions are affected by CVE-2025-30210?
It affects 1 product.
Products include Usebruno Bruno.
How do I fix CVE-2025-30210?
No fix has been published for CVE-2025-30210 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-30210 being exploited?
There is no known exploitation of CVE-2025-30210 in the wild and no public exploit code.
Other vulnerabilities in usebruno bruno
Sources
Also known as GHSA-fqxc-cxph-9vq8.