CVE-2025-8043 — User Interface (UI) Misrepresentation of Critical Information in Mozilla Firefox

CWE-451 — User Interface (UI) Misrepresentation of Critical Information7 documents7 sources
Severity
9.8CRITICALNVD
EPSS
0.1%
top 64.53%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla FirefoxMozilla Thunderbird
Timeline
PublishedJul 22

Description

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

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages2 packages

▶NVDmozilla/firefox< 141.0
▶NVDmozilla/thunderbird< 141.0

🔴Vulnerability Details

3
OSV
CVE-2025-8043: Focus incorrectly truncated URLs towards the beginning instead of around the origin↗2025-07-22
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CVEList
Incorrect URL truncation↗2025-07-22
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GHSA
GHSA-ww6j-fhx6-wrxh: Focus incorrectly truncated URLs towards the beginning instead of around the origin↗2025-07-22
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📋Vendor Advisories

3
Red Hat
firefox: thunderbird: Incorrect URL truncation↗2025-07-22
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Debian
CVE-2025-8043: firefox - Focus incorrectly truncated URLs towards the beginning instead of around the ori...↗2025
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Mozilla
Mozilla Foundation Security Advisory 2025-56: CVE-2025-8043↗
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CVE-2025-8043 — Mozilla Firefox vulnerability | cvebase