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WebExtensions could use the "mozAddonManager" API by modifying the CSP headers on sites with the appropriate permissions and then using host requests to redirect script loads to a malicious site. This allows a malicious extension to then install additional extensions without explicit user permission. This vulnerability affects Firefox < 51.
Base Score
6.1| Base Score | 6.1 |
|---|---|
| Vector String | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| Base Severity | Medium |
| Version | 3.0 |
| Attack Vector (AV) | NETWORK |