CVE-2017-7840 describes a self-Cross-Site Scripting (self-XSS) vulnerability in Mozilla Firefox versions prior to 57. Malicious JavaScript could be injected into exported bookmark files by embedding it within user-supplied bookmark tags. If a user was socially engineered into adding these malicious tags, exporting their bookmarks, and then opening the resulting HTML file in a browser, the JavaScript would execute. The vulnerability has a CVSS v3 score of 6.1 (Medium), indicating a network-based attack with low complexity, requiring user interaction, and leading to low impact on confidentiality and integrity. Its EPSS score is low, suggesting a minimal probability of exploitation. There is no evidence of active exploitation, and no public exploit code is available in Metasploit, Nuclei, or ExploitDB. The CVE has received no community discussion or media coverage, further indicating a low level of attention and perceived threat.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 56.0.2CPE matchmatch criteria | cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* | ||
< 57CPE 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:R/S:C/C:L/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 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.