CVE-2025-6429
24.06.2025, 13:15
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.Enginsight
Vendor | Product | Version |
---|---|---|
mozilla | firefox | 𝑥 < 128.12.0 |
mozilla | firefox | 𝑥 < 140.0 |
𝑥
= Vulnerable software versions

Debian Releases
Debian Product | |||||||||||||||
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firefox |
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firefox-esr |
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thunderbird |
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Ubuntu Releases
Ubuntu Product | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
firefox |
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thunderbird |
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mozjs38 |
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mozjs52 |
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mozjs68 |
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mozjs78 |
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mozjs91 |
| ||||||||||||
mozjs102 |
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mozjs115 |
|