CVE-2017-7820 describes a vulnerability in Firefox versions prior to 56 where the "instanceof" operator can bypass the Xray wrapper, allowing web content to manipulate its result and potentially trick the browser or extensions. This medium-severity vulnerability has a CVSS score of 5.3, indicating a network-based attack with low complexity, requiring no user interaction, and potentially leading to a loss of integrity. There is no evidence of active exploitation, and no public exploit code is available in Metasploit, Nuclei, or ExploitDB. Community discussion is minimal, with only one mention on Reddit.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 55.0.3CPE matchmatch criteria | cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* | ||
< 56CPE match | cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.