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Vulnerabilities

Vulnerability · CVE-2025-8043

Focus incorrectly truncated URLs towards the beginning instead of around the origin.

Published Jul 22, 2025 · catalog updated Apr 13, 2026 · Focus incorrectly truncated URLs

Last checked Oct 29, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-8043. EPSS is 0.43%. Act only if a listed version of Focus incorrectly truncated URLs is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Focus incorrectly truncated URLs).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.43%
Remediation
Advisory link
Affected products
vendor mozilla

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor mozillaversion unspecified

How to fix CVE-2025-8043

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-8043. EPSS is 0.43%. Act only if a listed version of Focus incorrectly truncated URLs is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.43%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 22, 2025 · EUVD

    Detected

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

  2. Apr 13, 2026 · EUVD

    Updated

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

Sources

  • CVE.orgVulnerability recordCVE-2025-8043

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-8043

    30-day exploitation probability 0.43%

    first.org
  • EUVDVulnerability recordEUVD-2025-22358

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

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 29, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 29, 2026
  • CVE.orgOct 21, 2026
  • EUVDOct 20, 2026