Vulnerabilities

If a text string that happens to be a filename in the operating system's native format is dragged and dropped onto the addressbar the specified local file will be opened.

If a URL using the "file:" protocol is dragged and dropped onto an open tab that is running in a different child process the tab will open a local file corresponding to the dropped URL, contrary to policy.

A use-after-free vulnerability can occur during WebGL operations.

A vulnerability exists in XSLT during number formatting where a negative buffer size may be allocated in some instances, leading to a buffer overflow and crash if it occurs.

The JSON Viewer displays clickable hyperlinks for strings that are parseable as URLs, including "javascript:" links.

A mechanism to bypass Content Security Policy (CSP) protections on sites that have a "script-src" policy of "'strict-dynamic'".

The filename appearing in the "Downloads" panel improperly renders some Unicode characters, allowing for the file name to be spoofed.

The Live Bookmarks page and the PDF viewer can run injected script content if a user pastes script from the clipboard into them while viewing RSS feeds or PDF files.

If manipulated hyperlinked text with "chrome:" URL contained in it is dragged and dropped on the "home" icon, the home page can be reset to include a normally-unlinkable chrome page as one of the home page tabs.

Sites can bypass security checks on permissions to install lightweight themes by manipulating the "baseURI" property of the theme element.

The web console and JavaScript debugger do not sanitize all output that can be hyperlinked.

WebExtensions can use request redirection and a "filterReponseData" filter to bypass host permission settings to redirect network traffic and access content from a host for which they do not have explicit user permission…

Content Security Policy (CSP) is not applied correctly to all parts of multipart content sent with the "multipart/x-mixed-replace" MIME type.

If a malicious attacker has used another vulnerability to gain full control over a content process, they may be able to replace the alternate data resources stored in the JavaScript Start-up Bytecode Cache (JSBC) for oth…

WebRTC can use a "WrappedI420Buffer" pixel buffer but the owning image object can be freed while it is still in use.

An integer overflow can occur in the Skia library due to 32-bit integer use in an array without integer overflow checks, resulting in possible out-of-bounds writes.

The PDF viewer does not sufficiently sanitize PostScript calculator functions, allowing malicious JavaScript to be injected through a crafted PDF file.

Same-origin protections for the PDF viewer can be bypassed, allowing a malicious site to intercept messages meant for the viewer.

A use-after-free vulnerability can occur while adjusting layout during SVG animations with text paths.

A use-after-free vulnerability can occur while enumerating attributes during SVG animations with clip paths.

If websocket data is sent with mixed text and binary in a single message, the binary data can be corrupted.

WebExtensions with the appropriate permissions can attach content scripts to Mozilla sites such as accounts.firefox.com and listen to network traffic to the site through the "webRequest" API.

Memory safety bugs were reported in Firefox 59.

Memory safety bugs were reported in Firefox 59, Firefox ESR 52.7, and Thunderbird 52.7.