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.

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.

Mozilla before 1.7 allows remote web servers to read arbitrary files via Javascript that sets the value of an <input type="file"> tag.

Mozilla allows remote attackers to cause Mozilla to open a URI as a different MIME type than expected via a null character (%00) in an FTP URI.

Mozilla before 1.7, Firefox before 0.9, and Thunderbird before 0.7, allow remote attackers to use certain redirect sequences to spoof the security lock icon that makes a web page appear to be encrypted.

Mozilla before 1.7, Firefox before 0.9, and Thunderbird before 0.7, allow remote web sites to install arbitrary extensions by using interactive events to manipulate the XPInstall Security dialog box.

Mozilla before 1.7, Firefox before 0.9, and Thunderbird before 0.7, allow remote web sites to hijack the user interface via the "chrome" flag and XML User Interface Language (XUL) files.

The cert_TestHostName function in Mozilla before 1.7, Firefox before 0.9, and Thunderbird before 0.7, only checks the hostname portion of a certificate when the hostname portion of the URI is not a fully qualified domain name (FQDN), which allows remote attackers to spoof trusted certificates.

Mozilla (Suite) before 1.7.1, Firefox before 0.9.2, and Thunderbird before 0.7.2 allow remote attackers to launch arbitrary programs via a URI referencing the shell: protocol.

Unknown versions of Mozilla allow remote attackers to cause a denial of service (high CPU/RAM consumption) using Javascript with an infinite loop that continues to add input to a form, possibly as the result of inserting control characters, as demonstrated using an embedded ctrl-U.

Mozilla before 1.4.2 executes Javascript events in the context of a new page while it is being loaded, allowing it to interact with the previous page (zombie document) and enable cross-domain and cross-site scripting (XSS) attacks, as demonstrated using onmousemove events.

The Script.prototype.freeze/thaw functionality in Mozilla 1.4 and earlier allows attackers to execute native methods by modifying the string used as input to the script.thaw JavaScript function, which is then deserialized and executed.

Heap-based buffer overflow in Netscape 6.2.3 and Mozilla 1.0 and earlier allows remote attackers to crash client browsers and execute arbitrary code via a PNG image with large width and height values and an 8-bit or 16-bit alpha channel.

The Javascript "Same Origin Policy" (SOP), as implemented in (1) Netscape, (2) Mozilla, and (3) Internet Explorer, allows a remote web server to access HTTP and SOAP/XML content from restricted sites by mapping the malicious server's parent DNS domain name to the restricted site, loading a page from the restricted site into one frame, and passing the information to the attacker-controlled frame, which is allowed because the document.domain of the two frames matches on the parent domain.