CVE-2012-4203

Severity: medium (CVSS 6.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2012-11-21 · updated 2026-06-16
Weakness: CWE-264

Description

The New Tab page in Mozilla Firefox before 17.0 uses a privileged context for execution of JavaScript code by bookmarklets, which allows user-assisted remote attackers to run arbitrary programs by leveraging a javascript: URL in a bookmark.

Affected products

Mozilla Firefox: through 16.0.2; 0.1, 0.2, 0.3, 0.4, 0.5, 0.6 (+164)

References

http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00021.html
http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00022.html
http://lists.opensuse.org/opensuse-updates/2012-11/msg00090.html
http://lists.opensuse.org/opensuse-updates/2012-11/msg00093.html
http://secunia.com/advisories/51369
http://secunia.com/advisories/51434
http://secunia.com/advisories/51439
http://www.mozilla.org/security/announce/2012/mfsa2012-95.html
http://www.securityfocus.com/bid/56623
http://www.ubuntu.com/usn/USN-1638-1
http://www.ubuntu.com/usn/USN-1638-2
http://www.ubuntu.com/usn/USN-1638-3

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