Is CVE-2025-4084 in the CISA KEV catalog?

No. CVE-2025-4084 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-4084?

CVE-2025-4084 has a CVSS v3 base score of 5.7 (MEDIUM).

What is the EPSS score for CVE-2025-4084?

CVE-2025-4084 has an EPSS score of 0.34% (26th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-4084?

Upgrade DeveloperEdition to 115.23 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2025-4084

MEDIUM

5.7

CVSS v3

NVD

Description

Due to insufficient escaping of the special characters in the "copy as cURL" feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. *This bug only affects Firefox for Windows. Other versions of Firefox are unaffected.*. This vulnerability was fixed in Firefox ESR 128.10, Firefox ESR 115.23, and Thunderbird 128.10.

CWE-116

How to fix

Remediation Available

DeveloperEditionWindows application

Affected:115.23Fixed in:115.23Mozilla

Affected:128.0 128.10Fixed in:128.10Mozilla

Mozilla Firefox (en-US)Windows application

Affected:115.23Fixed in:115.23Mozilla

Affected:128.0 128.10Fixed in:128.10Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:128.10.0Fixed in:128.10.0Mozilla

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 RequiredLow

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.34%probability of exploitation in 30 days

26thpercentile

Low risk: more likely to be exploited than 26% of all known CVEs.

References

Vendor Advisory3

Other references2

Related Vulnerabilities

Other CWE-116 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-38475	Critical	9.1	100%	KEV	Fix
CVE-2022-36446	Critical	9.8	96%	-	Fix
CVE-2021-31806	Medium	6.5	96%	-	Fix
CVE-2022-30781	High	7.5	88%	-	Fix
CVE-2022-36099	Critical	9.9	76%	-	Fix
CVE-2022-36100	Critical	9.9	74%	-	Fix

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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 2026-04-13.