Vulnerability Details : CVE-2017-7840
JavaScript can be injected into an exported bookmarks file by placing JavaScript code into user-supplied tags in saved bookmarks. If the resulting exported HTML file is later opened in a browser this JavaScript will be executed. This could be used in social engineering and self-cross-site-scripting (self-XSS) attacks if users were convinced to add malicious tags to bookmarks, export them, and then open the resulting file. This vulnerability affects Firefox < 57.
Vulnerability category: Cross site scripting (XSS)
Products affected by CVE-2017-7840
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2017-7840
0.73%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 71 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2017-7840
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:P/A:N |
8.6
|
2.9
|
NIST | |
|
6.1
|
MEDIUM | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
2.8
|
2.7
|
NIST |
CWE ids for CVE-2017-7840
-
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-7840
-
http://www.securitytracker.com/id/1039803
Mozilla Firefox Multiple Bugs Let Remote Users Spoof URLs, Conduct Cross-Site Scripting Attacks, Bypass Security Controls, Obtain Potentially Sensitive Information, and Execute Arbitrary Code and LetThird Party Advisory;VDB Entry
-
https://bugzilla.mozilla.org/show_bug.cgi?id=1366420
1366420 - (CVE-2017-7840) Javascript injection / XSS in bookmark exportIssue Tracking;Permissions Required
-
http://www.securityfocus.com/bid/101832
Mozilla Firefox Prior to 57 Multiple Security VulnerabilitiesThird Party Advisory;VDB Entry
-
https://www.mozilla.org/security/advisories/mfsa2017-24/
Security vulnerabilities fixed in Firefox 57 — MozillaVendor Advisory
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