Is CVE-2025-8043 in the CISA KEV catalog?

No. CVE-2025-8043 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-8043?

CVE-2025-8043 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2025-8043?

CVE-2025-8043 has an EPSS score of 0.37% (29th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-8043?

Upgrade firefox on debian unstable to 141.0-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2025-8043

CRITICAL

9.8

CVSS v3

NVD

Description

Focus incorrectly truncated URLs towards the beginning instead of around the origin. This vulnerability was fixed in Firefox 141.

CWE-451

How to fix

Remediation Available

firefoxDebian

Fixed in:141.0-1CVE-2025-8043

DeveloperEditionWindows application

Affected:141.0Fixed in:141.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:141.0Fixed in:141.0Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:141.0Fixed in:141.0Mozilla

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 InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.37%probability of exploitation in 30 days

29thpercentile

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

References

Exploit1

bugzilla.mozilla.org

Vendor Advisory1

mozilla.org

Related Vulnerabilities

Other CWE-451 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-38112	High	7.5	84%	KEV	Fix
CVE-2025-9491	High	7.8	63%	-	-
CVE-2024-43461	High	8.8	52%	KEV	Fix
CVE-2024-38197	Medium	6.5	16%	-	-
CVE-2024-49040	High	7.5	7.7%	-	Fix
CVE-2026-21527	High	6.5	7.7%	-	Fix

Embed a live status badge for CVE-2025-8043

Markdown

[![CVE-2025-8043](https://tridentstack.com/cve/badge/CVE-2025-8043.svg)](https://tridentstack.com/cve/CVE-2025-8043)

HTML

<a href="https://tridentstack.com/cve/CVE-2025-8043"><img src="https://tridentstack.com/cve/badge/CVE-2025-8043.svg" alt="CVE-2025-8043"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

See how it works Start freeThis CVE lookup is free and always will be.

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.