CVE-2025-30354

MEDIUM

4.3

CVSS v3

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.

CWE-942

How to fix

Remediation Available

BrunoWindows application

Affected:1.39.1Fixed in:1.39.1Anoop M D

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Exploit Intelligence

0.36%probability of exploitation in 30 days

29thpercentile

Low risk: more likely to be exploited than 29% of all known CVEs.

References

Exploit1

github.com

Related Vulnerabilities

Other CWE-942 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2026-22812	High	8.8	17%	-	Fix
CVE-2023-38122	High	7.2	1.9%	-	Fix
CVE-2019-14860	Medium	6.5	1.2%	-	Fix
CVE-2023-38125	High	8.8	1.1%	-	Fix
CVE-2022-31736	Critical	9.8	1.1%	-	Fix
CVE-2020-36851	Unscored	-	1.0%	-	-

Common questions

How do I fix CVE-2025-30354?

Upgrade Bruno to 1.39.1 or later.

Is CVE-2025-30354 being actively exploited?

Not that we know of. CVE-2025-30354 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.36% is the estimated probability that it will be exploited in the next 30 days. That is higher than 29% of all scored CVEs.

How severe is CVE-2025-30354?

CVE-2025-30354 has a CVSS v3 base score of 4.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2025-30354 affect?

Published advisories record a fix for Bruno (Windows application). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-09-22.