9.8crit
CVE-2018-5116
WebExtensions with the "ActiveTab" permission are able to access frames hosted within the active tab even if the frames are cross-origin.
Published 8 y ago · modified 4 mo ago · JSON
CVSS
9.8
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
1.1%
percentile 67%
Public exploits
0
none known
Summary
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.
Exploit prediction (EPSS)
1.14% probability of exploitation in the next 30 days, higher than 67% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| NVD | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Affected products
- Mozilla Firefox
Classification
- Weakness
- CWE-346 Origin Validation Error
References
- securitytracker.com /id/1040270 · vdb-entry, x_refsource_SECTRACK, x_transferred
- bugzilla.mozilla.org /show_bug.cgi?id=1396399 · x_refsource_CONFIRM, x_transferred
- usn.ubuntu.com /3544-1/ · vendor-advisory, x_refsource_UBUNTU, x_transferred
- securityfocus.com /bid/102786 · vdb-entry, x_refsource_BID, x_transferred
- mozilla.org /security/advisories/mfsa2018-02/ · x_refsource_CONFIRM, x_transferred
Sources
- CVE List: CVE-2018-5116
- NVD: CVE-2018-5116
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