Security researchers have since found similar misconfiguration flaws in other stacks (e.g., WampServer’s 3.2.3 alias exposure, Laragon’s default credential leaks). The XAMPP 7.4.6 incident is a case study in the OWASP Top 10's .
The exploit typically begins with a Local File Inclusion (LFI) or an insecure file upload vulnerability in a web application hosted on the stack. Attackers utilize a PHP script, often referred to as a "web shell" (such as the infamous c99 or r57 shells), which they upload to the server. Because the Apache process has write permissions to the web directories—another default misconfiguration—the attacker can place this malicious file onto the server.
permits any user to modify its configuration file, which can then be used to trick an administrator into executing malicious code. Exploit-DB Technical Breakdown of CVE-2020-11107 The vulnerability stems from insecure permissions on the xampp-control.ini configuration file in the XAMPP installation directory. Pentest-Tools.com Insecure Configuration Modification xampp for windows 746 exploit
, which affected several versions before 7.4.4. While 7.4.6 was a security-patched release intended to fix earlier issues, security researchers often use it to test for similar misconfigurations like insecure file permissions or unquoted service paths. Principal Vulnerability: CVE-2020-11107
As of 2025, XAMPP 7.4.6 is long deprecated. PHP 7.4 reached end-of-life in November 2022. However, . Attackers utilize a PHP script, often referred to
# Remove Everyone write permission from htdocs icacls "C:\xampp\htdocs" /inheritance:r /grant:r "SYSTEM:(OI)(CI)F" /grant:r "Administrators:(OI)(CI)F" /grant:r "IIS_IUSRS:(OI)(CI)RX"
Disable PHP-CGI: If your application doesn't strictly require PHP-CGI, consider switching to a more secure and modern integration method like PHP-FPM or mod_php. and Perl environment in minutes.
XAMPP is the most popular software stack for local web development. For years, developers have relied on its ability to spin up an Apache, MySQL, PHP, and Perl environment in minutes. However, when version 7.4.6 was released for Windows in early 2020, it carried a silent passenger: a critical misconfiguration that transformed a tool meant for localhost into a wide-open gateway for remote attackers.