4.3
Medium
CVE-2025-1935 A web page could trick a user into setting that site as the default handler for a custom URL protocol
Description
A web page could trick a user into setting that site as the default handler for a custom URL protocol. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 136 | earliest → < 136 | 136 |
| Firefox 128.8 | earliest → < 128.8 | 128.8 |
| Firefox ESR 128.8 | earliest → < 128.8 | 128.8 |
| Thunderbird 136 | earliest → < 136 | 136 |
| Thunderbird 128.8 | earliest → < 128.8 | 128.8 |
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