CVE-2025-6434
24.06.2025, 13:15
The exception page for the HTTPS-Only feature, displayed when a website is opened via HTTP, lacked an anti-clickjacking delay, potentially allowing an attacker to trick a user into granting an exception and loading a webpage over HTTP. This vulnerability affects Firefox < 140 and Thunderbird < 140.Enginsight
Vendor | Product | Version |
---|---|---|
mozilla | firefox | 𝑥 < 140.0 |
𝑥
= Vulnerable software versions

Ubuntu Releases
Ubuntu Product | |||||||||||||
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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 |
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mozjs102 |
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mozjs115 |
|