8.1
High
CVE-2025-8029 Thunderbird executed `javascript:` URLs when used in `object` and `embed` tags
Description
Thunderbird executed `javascript:` URLs when used in `object` and `embed` tags. This vulnerability was fixed in Firefox 141, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 141 | earliest → < 141 | 141 |
| Firefox 140.1 | earliest → < 140.1 | 140.1 |
| Firefox 128.13 | earliest → < 128.13 | 128.13 |
| Firefox ESR 140.1 | earliest → < 140.1 | 140.1 |
| Thunderbird 141 | earliest → < 141 | 141 |
| Thunderbird 140.1 | earliest → < 140.1 | 140.1 |
| Thunderbird 128.13 | earliest → < 128.13 | 128.13 |