CKEditor is an open source

Open source

The term open source describes practices in production and development that promote access to the end product's source materials. Some consider open source a philosophy, others consider it a pragmatic methodology...

 WYSIWYG

WYSIWYG

WYSIWYG is an acronym for What You See Is What You Get. The term is used in computing to describe a system in which content displayed onscreen during editing appears in a form closely corresponding to its appearance when printed or displayed as a finished product...

 text editor

Text editor

A text editor is a type of program used for editing plain text files.Text editors are often provided with operating systems or software development packages, and can be used to change configuration files and programming language source code....

 from CKSource that can be used in web pages. It aims to be lightweight and requires no client-side installation. The first version was released in 2003.

Its core code is written in JavaScript

JavaScript

JavaScript is a prototype-based scripting language that is dynamic, weakly typed and has first-class functions. It is a multi-paradigm language, supporting object-oriented, imperative, and functional programming styles....

, having server side interfaces with Active-FoxPro, ASP

Active Server Pages

Active Server Pages , also known as Classic ASP or ASP Classic, was Microsoft's first server-side script engine for dynamically-generated Web pages. Initially released as an add-on to Internet Information Services via the Windows NT 4.0 Option Pack Active Server Pages (ASP), also known as Classic...

, ASP.NET

ASP.NET

ASP.NET is a Web application framework developed and marketed by Microsoft to allow programmers to build dynamic Web sites, Web applications and Web services. It was first released in January 2002 with version 1.0 of the .NET Framework, and is the successor to Microsoft's Active Server Pages ...

, ColdFusion

ColdFusion

In computing, ColdFusion is the name of a commercial rapid application development platform invented by Jeremy and JJ Allaire in 1995. ColdFusion was originally designed to make it easier to connect simple HTML pages to a database, by version 2 it had...

, Java

Java (Sun)

Java refers to several computer software products and specifications from Sun Microsystems, a subsidiary of Oracle Corporation, that together provide a system for developing application software and deploying it in a cross-platform environment...

, JavaScript

JavaScript

JavaScript is a prototype-based scripting language that is dynamic, weakly typed and has first-class functions. It is a multi-paradigm language, supporting object-oriented, imperative, and functional programming styles....

, Lasso, Perl

Perl

Perl is a high-level, general-purpose, interpreted, dynamic programming language. Perl was originally developed by Larry Wall in 1987 as a general-purpose Unix scripting language to make report processing easier. Since then, it has undergone many changes and revisions and become widely popular...

, PHP

PHP

PHP is a general-purpose server-side scripting language originally designed for web development to produce dynamic web pages. For this purpose, PHP code is embedded into the HTML source document and interpreted by a web server with a PHP processor module, which generates the web page document...

 and Python

Python (programming language)

Python is a general-purpose, high-level programming language whose design philosophy emphasizes code readability. Python claims to "[combine] remarkable power with very clear syntax", and its standard library is large and comprehensive...

.

CKEditor is compatible with most Internet browsers, including: Internet Explorer

Internet Explorer

Windows Internet Explorer is a series of graphical web browsers developed by Microsoft and included as part of the Microsoft Windows line of operating systems, starting in 1995. It was first released as part of the add-on package Plus! for Windows 95 that year...

 6.0+ (Windows

Microsoft Windows

Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

), Firefox 2.0+, Safari

Safari (web browser)

Safari is a web browser developed by Apple Inc. and included with the Mac OS X and iOS operating systems. First released as a public beta on January 7, 2003 on the company's Mac OS X operating system, it became Apple's default browser beginning with Mac OS X v10.3 "Panther". Safari is also the...

 3.0+, Google Chrome

Google Chrome

Google Chrome is a web browser developed by Google that uses the WebKit layout engine. It was first released as a beta version for Microsoft Windows on September 2, 2008, and the public stable release was on December 11, 2008. The name is derived from the graphical user interface frame, or...

 (Windows), Opera

Opera (web browser)

Opera is a web browser and Internet suite developed by Opera Software with over 200 million users worldwide. The browser handles common Internet-related tasks such as displaying web sites, sending and receiving e-mail messages, managing contacts, chatting on IRC, downloading files via BitTorrent,...

 9.50+, and Camino

Camino

Camino is a free, open source, GUI-based Web browser based on Mozilla's Gecko layout engine and specifically designed for the Mac OS X operating system...

 1.0+ (Apple).

MediaWiki+FCKeditor

MediaWiki+FCKeditor is a branch of FCKeditor developed for WYSIWYG wiki

Wiki

A wiki is a website that allows the creation and editing of any number of interlinked web pages via a web browser using a simplified markup language or a WYSIWYG text editor. Wikis are typically powered by wiki software and are often used collaboratively by multiple users. Examples include...

 editing. For more information, see Extension:FCKeditor (Official).

Name change

The FCK in FCKeditor stands for Frederico Caldeira Knabben, the creator of the editor and the project's Benevolent Dictator for Life

Benevolent Dictator For Life

Benevolent Dictator For Life is a title given to a small number of open-source software-development leaders, typically project founders who retain the final say in disputes or arguments within the community....

. Those letters resemble a well-known vulgarity

Fuck

"Fuck" is an English word that is generally considered obscene which, in its most literal meaning, refers to the act of sexual intercourse. By extension it may be used to negatively characterize anything that can be dismissed, disdained, defiled, or destroyed."Fuck" can be used as a verb, adverb,...

 in the English language (something that Frederico, a native Brazil

Brazil

Brazil , officially the Federative Republic of Brazil , is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population with over 192 million people...

ian, was unaware of when he first released the program). As a result, Knabben changed the program's name to CKEditor beginning with v3.0. The CK letters now stand for Content and Knowledge.

Vulnerabilities

FCKEditor 2.5.1 and 2.6.6 contain a file renaming bug that allows remote code execution. Specifically, it is possible to upload ASP code via the ASP.NET connector in FCKEditor. The vulnerability requires that the remote server be running IIS. The vulnerability

Vulnerability (computing)

In computer security, a vulnerability is a weakness which allows an attacker to reduce a system's information assurance.Vulnerability is the intersection of three elements: a system susceptibility or flaw, attacker access to the flaw, and attacker capability to exploit the flaw...

 was discovered by security researchers from Rapid7

Rapid7

Rapid7 is a vulnerability management and penetration testing company headquartered in Boston, Massachusetts. Its primary products are Nexpose and Metasploit...

 in August 2010.

External links

• CKEditor product web site
• CKSource company web site
• SourceForge page
• Extension:FCKeditor (Official)
• WYSIWYG editor—WYSIWYG
  WYSIWYG
  WYSIWYG is an acronym for What You See Is What You Get. The term is used in computing to describe a system in which content displayed onscreen during editing appears in a form closely corresponding to its appearance when printed or displayed as a finished product...
  
   editing and software for MediaWiki
  MediaWiki
  MediaWiki is a popular free web-based wiki software application. Developed by the Wikimedia Foundation, it is used to run all of its projects, including Wikipedia, Wiktionary and Wikinews. Numerous other wikis around the world also use it to power their websites...
  
   and some wiki farms. It has an FCKeditor section.