CVE-2017-7839

MEDIUM

Description

Control characters prepended before "javascript:" URLs pasted in the addressbar can cause the leading characters to be ignored and the pasted JavaScript to be executed instead of being blocked. This could be used in social engineering and self-cross-site-scripting (self-XSS) attacks where users are convinced to copy and paste text into the addressbar. This vulnerability affects Firefox < 57.

References

http://www.securityfocus.com/bid/101832

http://www.securitytracker.com/id/1039803

https://bugzilla.mozilla.org/show_bug.cgi?id=1402896

https://www.mozilla.org/security/advisories/mfsa2017-24/

Details

Source: MITRE

Published: 2018-06-11

Updated: 2018-06-25

Type: CWE-79

Risk Information

CVSS v2.0

Base Score: 4.3

Vector: (AV:N/AC:M/Au:N/C:N/I:P/A:N)

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3.0

Base Score: 6.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Impact Score: 2.7

Exploitability Score: 2.8

Severity: MEDIUM