CVE-2012-1957 Cross-site scripting in n/a
Remote attackers can execute cross-site scripting attacks in Firefox, Thunderbird, and SeaMonkey by exploiting improper handling of EMBED elements in RSS feeds.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2012-1957?
CVE-2012-1957 is a medium-severity cross-site scripting vulnerability in Mozilla Firefox, published on 18 Jul 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
An unspecified parser-utility class in Mozilla Firefox 4.x through 13.0, Firefox ESR 10.x before 10.0.6, Thunderbird 5.0 through 13.0, Thunderbird ESR 10.x before 10.0.6, and SeaMonkey before 2.11 does not properly handle EMBED elements within description elements in RSS feeds, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a feed.
Weakness: CWE-79
Which versions are affected by CVE-2012-1957?
It affects 4 products.
Products include Mozilla Firefox, Mozilla Seamonkey, Mozilla Thunderbird, Mozilla Thunderbird Esr.
How do I fix CVE-2012-1957?
Upgrade to a fixed version.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2012-1957 being exploited?
There is no known exploitation of CVE-2012-1957 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-f778-wp6q-3cwj.