How severe is CVE-2025-30354?

CVE-2025-30354 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2025-30354 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-30354?

CVE-2025-30354 affects Usebruno Bruno. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-30354?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-30354 have an EU (EUVD) identifier?

Yes. CVE-2025-30354 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-9430.

When was CVE-2025-30354 published?

CVE-2025-30354 was published on 2025-04-01 and last updated on 2026-06-17.

CVE-2025-30354

CVE-2025-30354 is a medium-severity vulnerability in Usebruno Bruno with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-942.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v4: 8.7
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-9430
Weakness: CWE-942
Affected product: Usebruno Bruno
Published: 2025-04-01
Last modified: 2026-06-17

Description

Bruno is an open source IDE for exploring and testing APIs. A bug in the assertion runtime caused assert expressions to run in Developer Mode, even if Safe Mode was selected. The bug resulted in the sandbox settings to be ignored for the particular case where a single request is run/sent. 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 collection. The vulnerability is fixed in 1.39.1.

Frequently asked questions

What is CVE-2025-30354?: Bruno is an open source IDE for exploring and testing APIs. A bug in the assertion runtime caused assert expressions to run in Developer Mode, even if Safe Mode was selected. The bug resulted in the sandbox settings to be ignored for the particular case where a single request is run/sent. 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 collection. The vulnerability is fixed in 1.39.1.
How severe is CVE-2025-30354?: CVE-2025-30354 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2025-30354 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-30354?: CVE-2025-30354 affects Usebruno Bruno. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-30354?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-30354 have an EU (EUVD) identifier?: Yes. CVE-2025-30354 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-9430.
When was CVE-2025-30354 published?: CVE-2025-30354 was published on 2025-04-01 and last updated on 2026-06-17.

References

https://github.com/usebruno/bruno/security/advisories/GHSA-hffg-7v8v-79j3

Affected products (1)

cpe:2.3:a:usebruno:bruno:*:*:*:*:*:*:*:*

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