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When installing an add-on, Firefox verified the signature before prompting the user; but while the user was confirming the prompt, the underlying add-on file could have been modified and Firefox would not have noticed. This vulnerability affects Firefox < 98, Firefox ESR < 91.7, and Thunderbird < 91.7.
Base Score
7.5
| Base Score | 7.5 |
|---|---|
| Vector String | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
| Base Severity | High |
| Version | 3.1 |
| Attack Vector (AV) | NETWORK |
