Security firm Secunia have advised on three vulnerabilities in popular Internet browsers Mozilla and Firefox.
The vulnerabilities can be exploited by malicious people and used to plant "MalWare" (MALicious softWARE, designed to destroy, aggravate and otherwise make life unhappy) on a user's system, conduct cross-site scripting attacks and bypass security restrictions.
The three vulnerabilities can be exploited to trick a user into changing some sensitive configuration settings.
The vulnerabilities have been confirmed in Mozilla v1.7.5 and Firefox v1.0. Other versions may also be affected.
Full details of the security issues are available in the Secunia advisory.