CVE-2025-8043
published 2025-07-22CVE-2025-8043: Focus incorrectly truncated URLs towards the beginning instead of around the origin. This vulnerability was fixed in Firefox 141.
PriorityP348critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.37%
29.0th percentile
Focus incorrectly truncated URLs towards the beginning instead of around the origin. This vulnerability was fixed in Firefox 141.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 141.0-1 (sid) | firefox 141.0-1 (sid) |
| mozilla | firefox | < 141.0 | 141.0 |
| mozilla | firefox | — | — |
| mozilla | thunderbird | < 141.0 | 141.0 |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
osv9.8CRITICAL
vendor_debian9.8CRITICAL
vendor_redhat9.8CRITICAL
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Red Hat
firefox: thunderbird: Incorrect URL truncation
vendor_redhat·2025-07-22·CVSS 9.8
CVE-2025-8043 [CRITICAL] CWE-451 firefox: thunderbird: Incorrect URL truncation
firefox: thunderbird: Incorrect URL truncation
Focus incorrectly truncated URLs towards the beginning instead of around the origin. This vulnerability affects Firefox < 141 and Thunderbird < 141.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Focus incorrectly truncated URLs towards the beginning instead of around the origin.
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Package: firefox (Red Hat Enterprise Linux 10) - Not affected
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Not affected
Package: rhel10/thunderbird-flatpak (Red Hat Enterprise Linux 10) - Not affected
Package: thunderbird (Red Hat Enterprise Linux
Debian
CVE-2025-8043: firefox - Focus incorrectly truncated URLs towards the beginning instead of around the ori...
vendor_debian·2025·CVSS 9.8
CVE-2025-8043 [CRITICAL] CVE-2025-8043: firefox - Focus incorrectly truncated URLs towards the beginning instead of around the ori...
Focus incorrectly truncated URLs towards the beginning instead of around the origin. This vulnerability affects Firefox < 141 and Thunderbird < 141.
Scope: local
sid: resolved (fixed in 141.0-1)
Mozilla
Mozilla Foundation Security Advisory 2025-56: CVE-2025-8043
vendor_mozilla·CVSS 9.8
CVE-2025-8043 [CRITICAL] Mozilla Foundation Security Advisory 2025-56: CVE-2025-8043
Mozilla Foundation Security Advisory 2025-56
CVE: CVE-2025-8043
Product: Firefox
Impact: high
Fixed in: Firefox 141
OSV
CVE-2025-8043: Focus incorrectly truncated URLs towards the beginning instead of around the origin
osv·2025-07-22·CVSS 9.8
CVE-2025-8043 [CRITICAL] CVE-2025-8043: Focus incorrectly truncated URLs towards the beginning instead of around the origin
Focus incorrectly truncated URLs towards the beginning instead of around the origin. This vulnerability affects Firefox < 141 and Thunderbird < 141.
GHSA
GHSA-ww6j-fhx6-wrxh: Focus incorrectly truncated URLs towards the beginning instead of around the origin
ghsa_unreviewed·2025-07-22
CVE-2025-8043 [CRITICAL] CWE-451 GHSA-ww6j-fhx6-wrxh: Focus incorrectly truncated URLs towards the beginning instead of around the origin
Focus incorrectly truncated URLs towards the beginning instead of around the origin. This vulnerability affects Firefox < 141 and Thunderbird < 141.
No detection rules found.
No public exploits indexed.
2025-07-22
Published