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CVE-2018-5116 WebExtensions with the "ActiveTab" permission are able to access frames hosted within the active tab even if the…
Description
WebExtensions with the "ActiveTab" permission are able to access frames hosted within the active tab even if the frames are cross-origin. Malicious extensions can inject frames from arbitrary origins into the loaded page and then interact with them, bypassing same-origin user expectations with this permission. This vulnerability affects Firefox < 58.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 58 | earliest → < 58 | 58 |
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