VDB
CISA-2025-6429
CISA-2025-6429
PUBLISHED
CVSS 6.5 MEDIUM
Reported by mozilla · Published June 24, 2025
Firefox could have incorrectly parsed a URL and rewritten it to the youtube.com domain when parsing the URL specified in an `embed` tag. This could have bypassed website security checks that restricted which domains users were allowed to embed. This vulnerability affects Firefox < 140, Firefox ESR < 128.12, Thunderbird < 140, and Thunderbird < 128.12.
Risk Scores
CVSS 3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | unspecified |
| Mozilla | Firefox ESR | unspecified |
| Mozilla | Thunderbird | unspecified |
| Mozilla | Thunderbird | unspecified |
| Mozilla | Firefox | unspecified, unspecified |
| Mozilla | Thunderbird | unspecified, unspecified, unspecified |
| Mozilla | Firefox ESR | unspecified, unspecified |
Timeline
- Jun 24, 2025 CVE Published
- Nov 3, 2025 CVE Updated