Firefox before 1.0 and Mozilla before 1.7.5 allows inactive (background) tabs to launch dialog boxes, which can allow remote attackers to spoof the dialog boxes from web sites in other windows and facilitate phishing attacks, aka the "Dialog Box Spoofing Vulnerability."
Firefox before 1.0 and Mozilla before 1.7.5 allow inactive (background) tabs to focus on input being entered in the active tab, as originally reported using form fields, which allows remote attackers to steal sensitive data that is intended for other sites, which could facilitate phishing attacks.
Mozilla allows remote attackers to cause a denial of service (application crash from null dereference or infinite loop) via a web page that contains a (1) TEXTAREA, (2) INPUT, (3) FRAMESET or (4) IMG tag followed by a null character and some trailing characters, as demonstrated by mangleme.
Mozilla allows remote attackers to cause a denial of service (application crash from invalid memory access) via an "unusual combination of visual elements," including several large MARQUEE tags with large height parameters, as demonstrated by mangleme.
Mozilla does not prevent cookies that are sent over an insecure channel (HTTP) from also being sent over a secure channel (HTTPS/SSL) in the same domain, which could allow remote attackers to steal cookies and conduct unauthorized activities, aka "Cross Security Boundary Cookie Injection."
Mozilla Firefox before the Preview Release, Mozilla before 1.7.3, and Thunderbird before 0.8 allows remote attackers to perform cross-domain scripting and possibly execute arbitrary code by convincing a user to drag and drop javascript: links to a frame or page in another domain.
Integer overflow in the SOAPParameter object constructor in (1) Netscape version 7.0 and 7.1 and (2) Mozilla 1.6, and possibly earlier versions, allows remote attackers to execute arbitrary code.
Heap-based buffer overflow in the SendUidl in the POP3 capability for Mozilla before 1.7, Firefox before 0.9, and Thunderbird before 0.7, may allow remote POP3 mail servers to execute arbitrary code.
Mozilla 1.5 through 1.7 allows a CA certificate to be imported even when their DN is the same as that of the built-in CA root certificate, which allows remote attackers to cause a denial of service to SSL pages because the malicious certificate is treated as invalid.