Mozilla Firefox before 3.0.15, and 3.5.x before 3.5.4, allows remote attackers to read form history by forging mouse and keyboard events that leverage the auto-fill feature to populate form fields, in an attacker-readable form, with history entries.

Mozilla Firefox before 3.0.15 and 3.5.x before 3.5.4, and SeaMonkey before 2.0, allows remote attackers to execute arbitrary code via a crafted regular expression in a Proxy Auto-configuration (PAC) file.

The XPCVariant::VariantDataToJS function in the XPCOM implementation in Mozilla Firefox 3.0.x before 3.0.15 and 3.5.x before 3.5.4 does not enforce intended restrictions on interaction between chrome privileged code and objects obtained from remote web sites, which allows remote attackers to execute arbitrary JavaScript with chrome privileges via unspecified method calls, related to "doubly-wrapped objects."

content/html/document/src/nsHTMLDocument.cpp in Mozilla Firefox 3.0.x before 3.0.15 and 3.5.x before 3.5.4 allows user-assisted remote attackers to bypass the Same Origin Policy and read an arbitrary content selection via the document.getSelection function.

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox 3.0.x before 3.0.15 and 3.5.x before 3.5.4 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.

Mozilla Firefox before 3.0.15 and 3.5.x before 3.5.4, and SeaMonkey before 2.0, does not properly handle a right-to-left override (aka RLO or U+202E) Unicode character in a download filename, which allows remote attackers to spoof file extensions via a crafted filename, as demonstrated by displaying a non-executable extension for an executable file.

layout/base/nsCSSFrameConstructor.cpp in the browser engine in Mozilla Firefox 3.0.x before 3.0.15 does not properly handle first-letter frames, which allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unspecified vectors.

Mozilla Firefox 3.6a1, 3.5.3, 3.5.2, and earlier 3.5.x versions, and 3.0.14 and earlier 2.x and 3.x versions, on Linux uses a predictable /tmp pathname for files selected from the Downloads window, which allows local users to replace an arbitrary downloaded file by placing a file in a /tmp location before the download occurs, related to the Download Manager component. NOTE: some of these details are obtained from third party information.

Unspecified vulnerability in the JavaScript engine in Mozilla Firefox before 3.0.14 allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.

Mozilla Firefox before 3.0.14 does not properly implement certain dialogs associated with the (1) pkcs11.addmodule and (2) pkcs11.deletemodule operations, which makes it easier for remote attackers to trick a user into installing or removing an arbitrary PKCS11 module.