Weakness (CWE)
CWE-77: Command Injection
The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.
More detail
Many protocols and products have their own custom command language. While OS or shell command strings are frequently discovered and targeted, developers may not realize that these other command languages might also be vulnerable to attacks.
How to prevent it (5 mitigations)
-
Architecture and Design
If at all possible, use library calls rather than external processes to recreate the desired functionality.
-
Implementation
If possible, ensure that all external commands called from the program are statically created.
-
Implementation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
-
Operation
Run time: Run time policy enforcement may be used in an allowlist fashion to prevent use of any non-sanctioned commands.
-
System Configuration
Assign permissions that prevent the user from accessing/opening privileged files.
Source: MITRE CWE-77
94 results · Clear filters · Feed
-
Critical 9.9
Total.js CMS RCE Vulnerability
An issue was discovered in Total.js CMS 12.0.0. An authenticated user with the widgets privilege can gain achieve Remote Command Execution (RCE) on the remote server by creating a malicious widget with a special tag containing JavaScript code that will be eva…
-
Critical 9.8
Command Injection in Xstream
Xstream API versions up to 1.4.6 and version 1.4.10, if the security framework has not been initialized, may allow a remote attacker to run arbitrary shell commands by manipulating the processed input stream when unmarshaling XML or any supported format. e.g.…
-
Critical 9.8
Use of Insufficiently Random Values in Railties Allows Remote Code Execution
A remote code execution vulnerability in development mode Rails <5.2.2.1, <6.0.0.beta3 can allow an attacker to guess the automatically generated development mode secret token. This secret token can be used in combination with other Rails internals to escalat…
-
Critical 9.8
Critical severity vulnerability that affects Haraka
Haraka version 2.8.8 and earlier comes with a plugin for processing attachments for zip files. Versions 2.8.8 and earlier can be vulnerable to command injection.
-
Critical 9.8
Command Injection in egg-scripts
A command injection vulnerability in egg-scripts <v2.8.1 allows arbitrary shell command execution through a maliciously crafted command line argument.
-
Critical 9.1
Remote Code Execution in Micro Focus Secure Messaging Gateway
An OS command injection vulnerability in the web administration component of Micro Focus Secure Messaging Gateway (SMG) allows a remote attacker authenticated as a privileged user to execute arbitrary OS commands on the SMG server. This can be exploited in co…
-
Critical 9.8
(1) boardData102.php, (2) boardData103.php, (3) boardDataJP.php, (4) boardDataNA.php, and (5) boardDataWW.php in Netgea…
KEV Mar 25, 2022 -
Critical 9.8
Remote code execution in PHPMailer
The isMail transport in PHPMailer before 5.2.20 might allow remote attackers to pass extra parameters to the mail command and consequently execute arbitrary code by leveraging improper interaction between the escapeshellarg function and internal escaping perf…
-
Critical 9.8
zend-mail remote code execution via Sendmail adapter
The setFrom function in the Sendmail adapter in the zend-mail component before 2.4.11, 2.5.x, 2.6.x, and 2.7.x before 2.7.2, and Zend Framework before 2.4.11 might allow remote attackers to pass extra parameters to the mail command and consequently execute ar…
-
Critical 9.8
Remote code execution in PHPMailer
The mailSend function in the isMail transport in PHPMailer before 5.2.18 might allow remote attackers to pass extra parameters to the mail command and consequently execute arbitrary code via a \" (backslash double quote) in a crafted Sender property.
KEV Jul 7, 2025 -
Critical 9.8
Swift Mailer mail transport Command Injection
The mail transport (aka Swift_Transport_MailTransport) in Swift Mailer before 5.4.5 might allow remote attackers to pass extra parameters to the mail command and consequently execute arbitrary code via a \" (backslash double quote) in a crafted e-mail address…
-
Critical 9.8
sapi/cgi/cgi_main.c in PHP before 5.3.12 and 5.4.x before 5.4.2, when configured as a CGI script (aka php-cgi), does no…
KEV Mar 25, 2022 -
Critical 9.8
masterCGI in the Unified Maintenance Tool in Alcatel OmniPCX Enterprise Communication Server R7.1 and earlier allows re…
KEV Apr 15, 2022 -
Critical 9.8
HP OpenView Network Node Manager 6.2 through 7.50 allows remote attackers to execute arbitrary commands via shell metac…
KEV Mar 25, 2022