PRTG Network Monitor before version 26.2.120.1449 ships a demo EXE/Script sensor that multiplies two integer parameters using cscript.exe. If a non-numeric value is passed instead, cscript.exe raises a 'Type mismatch' runtime error that includes the offending parameter value in plaintext. PRTG provides a documented placeholder variable, %windowspassword, which resolves to the configured Windows/domain password used by PRTG and can be passed as a sensor parameter.

Any PRTG user who is not restricted to read-only access and is permitted to create sensors (the default for non-read-only users) can pass %windowspassword as an argument to the demo VBScript sensor, triggering the type-mismatch error and causing PRTG to display the plaintext password in the sensor's error output.

Paessler PRTG Network Monitor before version 26.2.120.1449 is affected by a reflected Cross-Site Scripting (XSS) vulnerability. When a request is made for a non-existent resource ending in \".htm\", the web interface returns an HTTP 403 \"Forbidden Path\" error page that echoes the requested URL path into the HTML response body without proper output encoding or sanitization.

An unauthenticated, remote attacker can craft a URL containing an HTML/JavaScript payload in the path (e.g. https:////welcome.htm) and, once a victim with an active PRTG session opens the crafted link, execute arbitrary JavaScript in the security context of the PRTG web interface. Because the PRTG session cookie is not protected with the HttpOnly attribute, successful exploitation allows the attacker to read and exfiltrate the victim's session cookie, potentially leading to session hijacking.

PRTG Network Monitor before 23.1.82 allows remote attackers to write to files via the HTTP XML/REST Sensor.

PRTG Network Monitor before 23.1.82 allows remote attackers to write to files via the FTP Server Count Sensor.

A bodyclass XSS issue was discovered in Paessler PRTG before 23.3.86.1520.

A directory traversal was identified in Paessler PRTG before 23.4.88.1429 that made it possible to read local files.

Paessler PRTG Network Monitor before 25.4.114 allows XSS by an unauthenticated attacker via the filter parameter.

Paessler PRTG Network Monitor before 25.4.114 allows XSS by an unauthenticated attacker via the tag parameter.

Paessler PRTG Network Monitor before 25.4.114 allows Denial-of-Service (DoS) by an authenticated attacker via the Notification Contacts functionality.

Paessler PRTG Network Monitor SNMP Cross-Site Scripting Authentication Bypass Vulnerability. This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of Paessler PRTG Network Monitor. Some user interaction on the part of an administrator is required to exploit this vulnerability.

The specific flaw exists within the PRTG Network Monitor web interface. The issue results from the lack of proper validation of user-supplied data, which can lead to the injection of an arbitrary script. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-23371.

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of Paessler PRTG Network Monitor. Some user interaction on the part of an administrator is required to exploit this vulnerability. The specific flaw exists within the PRTG Network Monitor web interface. The issue results from the lack of proper validation of user-supplied data, which can lead to the injection of an arbitrary script. An attacker can leverage this vulnerability to bypass authentication on the system.

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of Paessler PRTG Network Monitor. Some user interaction on the part of an administrator is required to exploit this vulnerability. The specific flaw exists within the PRTG Network Monitor web interface. The issue results from the lack of proper validation of user-supplied data, which can lead to the injection of an arbitrary script. An attacker can leverage this vulnerability to bypass authentication on the system.

Paessler PRTG Network Monitor Cross-Site Scripting Authentication Bypass Vulnerability. This vulnerability allows remote attackers to bypass authentication on affected installations of Paessler PRTG Network Monitor. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the web console. The issue results from the lack of proper validation of user-supplied data, which can lead to the injection of an arbitrary script. An attacker can leverage this vulnerability to bypass authentication on the system. . Was ZDI-CAN-21182.

This vulnerability allows remote attackers to bypass authentication on affected installations of Paessler PRTG Network Monitor. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the web console. The issue results from the lack of proper validation of user-supplied data, which can lead to the injection of an arbitrary script. An attacker can leverage this vulnerability to bypass authentication on the system.

This vulnerability allows remote attackers to bypass authentication on affected installations of Paessler PRTG Network Monitor. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the web console. The issue results from the lack of proper validation of user-supplied data, which can lead to the injection of an arbitrary script. An attacker can leverage this vulnerability to bypass authentication on the system.

A command injection vulnerability was identified in PRTG 23.2.84.1566 and earlier versions in the HL7 sensor where an authenticated user with write permissions could abuse the debug option to write new files that could potentially get executed by the EXE/Script sensor. The severity of this vulnerability is high and received a score of 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

A path traversal vulnerability was identified in the WMI Custom sensor in PRTG 23.2.84.1566 and earlier versions where an authenticated user with write permissions could trick the WMI Custom sensor into behaving differently for existing files and non-existing files. This made it possible to traverse paths, allowing the sensor to execute files outside the designated custom sensors folder. The severity of this vulnerability is medium and received a score of 4.7 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

A path traversal vulnerability was identified in the HL7 sensor in PRTG 23.2.84.1566 and earlier versions where an authenticated user with write permissions could trick the HL7 sensor into behaving differently for existing files and non-existing files. This made it possible to traverse paths, allowing the sensor to execute files outside the designated custom sensors folder. The severity of this vulnerability is medium and received a score of 4.7 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

A cross-site request forgery (CSRF) token bypass was identified in PRTG 23.2.84.1566 and earlier versions that allows remote attackers to perform actions with the permissions of a victim user, provided the victim user has an active session and is induced to trigger the malicious request. This could force PRTG to execute different actions, such as creating new users. The severity of this vulnerability is high and received a score of 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

A path traversal vulnerability was identified in the SQL v2 sensors in PRTG 23.2.84.1566 and earlier versions where an authenticated user with write permissions could trick the SQL v2 sensors into behaving differently for existing files and non-existing files. This made it possible to traverse paths, allowing the sensor to execute files outside the designated custom sensors folder. The severity of this vulnerability is medium and received a score of 4.7 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

A command injection was identified in PRTG 23.2.84.1566 and earlier versions in the Dicom C-ECHO sensor where an authenticated user with write permissions could abuse the debug option to write new files that could potentially get executed by the EXE/Script sensor. The severity of this vulnerability is high and received a score of 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

PRTG Network Monitor through 22.2.77.2204 does not prevent custom input for a device’s icon, which can be modified to insert arbitrary content into the style tag for that device. When the device page loads, the arbitrary Cascading Style Sheets (CSS) data is inserted into the style tag, loading malicious content. Due to PRTG Network Monitor preventing “characters, and from modern browsers disabling JavaScript support in style tags, this vulnerability could not be escalated into a Cross-Site Scripting vulnerability.

PRTG Network Monitor before 21.3.69.1333 allows stored XSS via an unsanitized string imported from a User Object in a connected Active Directory instance.

PRTG Network Monitor 20.1.55.1775 allows /editsettings CSRF for user account creation.

An issue was discovered in PRTG Network Monitor before 21.1.66.1623. By invoking the screenshot functionality with prepared context paths, an attacker is able to verify the existence of certain files on the filesystem of the PRTG's Web server.

XSS exists in PRTG Network Monitor 20.1.56.1574 via crafted map properties. An attacker with Read/Write privileges can create a map, and then use the Map Designer Properties screen to insert JavaScript code. This can be exploited against any user with View Maps or Edit Maps access.

PRTG Network Monitor before 20.1.57.1745 allows remote unauthenticated attackers to obtain information about probes running or the server itself (CPU usage, memory, Windows version, and internal statistics) via an HTTP request, as demonstrated by type=probes to login.htm or index.htm.

A webserver component in Paessler PRTG Network Monitor 19.2.50 to PRTG 20.1.56 allows unauthenticated remote command execution via a crafted POST request or the what parameter of the screenshot function in the Contact Support form.

A Write to Arbitrary Location in Disk vulnerability exists in PRTG Network Monitor 19.1.49 and below that allows attackers to place files in arbitrary locations with SYSTEM privileges (although not controlling the contents of such files) due to insufficient sanitisation when passing arguments to the phantomjs.exe binary. In order to exploit the vulnerability, remote authenticated administrators need to create a new HTTP Full Web Page Sensor and set specific settings when executing the sensor.