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CVE-2025-6429

—
CVSS 3.1
6.5 medium
EPSS
<1%p24
Published
()
Modified
Description

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 was fixed in Firefox 140, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.

Vendors
mozilla
Products
firefox
Weakness
CWE-116
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
NVD CVE.org GitHub PoCs EPSS (0.3%)

In the news

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