CVE-2012-4203 Privilege escalation in n/a

What is CVE-2012-4203?

CVE-2012-4203 is a medium-severity vulnerability in Mozilla Firefox, published on 21 Nov 2012. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-264

Which versions are affected by CVE-2012-4203?

It affects 1 product.

Products include Mozilla Firefox.

How do I fix CVE-2012-4203?

Upgrade to a fixed version.

Is CVE-2012-4203 being exploited?

There is no known exploitation of CVE-2012-4203 in the wild and no public exploit code.

Other vulnerabilities in Mozilla Firefox

• CVE-2019-11708 Mozilla Firefox and Thunderbird Sandbox Escape Exploited Critical 10.0
• CVE-2010-3765 Mozilla Multiple Products Remote Code Execution Exploited Critical 9.8
• CVE-2022-26486 Mozilla Firefox Use-After-Free Exploited Critical 9.6
• CVE-2022-26485 Mozilla Firefox Use-After-Free Exploited High 8.8
• CVE-2019-11707 Mozilla Firefox and Thunderbird Type Confusion Exploited High 8.8

All Mozilla Firefox vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-rfmr-q5xq-hg6g.