Plesk 8.6.0, when short mail login names (SHORTNAMES) are enabled, allows remote attackers to bypass authentication and send spam e-mail via a message with (1) a base64-encoded username that begins with a valid shortname, or (2) a username that matches a valid password, as demonstrated using (a) SMTP and qmail, and (b) Courier IMAP and POP3.

Plesk 18.0 has Incorrect Access Control.

Directory traversal vulnerability in top.php3 in SWsoft Plesk for Windows 8.1 and 8.1.1 allows remote attackers to read arbitrary files via a .. (dot dot) in the locale_id parameter.

Multiple SQL injection vulnerabilities in SWSoft Plesk 7.6.1, 8.1.0, 8.1.1, and 8.2.0 for Windows allow remote attackers to execute arbitrary SQL commands via a PLESKSESSID cookie to (1) login.php3 or (2) auth.php3.

Uncontrolled search path element vulnerability in Plesk Installer affects version 3.27.0.0. A local attacker could execute arbitrary code by injecting DLL files into the same folder where the application is installed, resulting in DLL hijacking in edputil.dll, samlib.dll, urlmon.dll, sspicli.dll, propsys.dll and profapi.dll files.

Multiple cross-site scripting (XSS) vulnerabilities in SWsoft Plesk 8.0.1 and earlier allow remote attackers to inject arbitrary web script or HTML via unspecified parameters to (1) get_password.php or (2) login_up.php3.

Plesk 17.0 through 18.0.31 version, is vulnerable to a Cross-Site Scripting. A malicious subscription owner (either a customer or an additional user), can fully compromise the server if an administrator visits a certain page in Plesk related to the malicious subscription.

Cross-site scripting (XSS) vulnerability in login_up.php3 in Plesk 7.0 and 7.1 Reloaded allows remote attackers to inject arbitrary web script or HTML via the login_name parameter. NOTE: this might be the same vector as CVE-2006-6451.

Plesk CMS 18.0.37 is affected by an insecure permissions vulnerability that allows privilege Escalation from user to admin rights.

Multiple directory traversal vulnerabilities in SWsoft Plesk for Windows 7.6.1, 8.1.0, and 8.1.1 allow remote attackers to read arbitrary files via a .. (dot dot) in the locale_id parameter to (1) login.php3 or (2) login_up.php3.

Plesk 18.0.37 is affected by a Cross Site Request Forgery (CSRF) vulnerability that allows an attacker to insert data on the user and admin panel.

Plesk 18.0 has Incorrect Access Control.

Uncontrolled search path element vulnerability in Plesk Installer affects version 3.27.0.0. A local attacker could execute arbitrary code by injecting DLL files into the same folder where the application is installed, resulting in DLL hijacking in edputil.dll, samlib.dll, urlmon.dll, sspicli.dll, propsys.dll and profapi.dll files.

Plesk 17.0 through 18.0.31 version, is vulnerable to a Cross-Site Scripting. A malicious subscription owner (either a customer or an additional user), can fully compromise the server if an administrator visits a certain page in Plesk related to the malicious subscription.

Plesk CMS 18.0.37 is affected by an insecure permissions vulnerability that allows privilege Escalation from user to admin rights. OTE: the vendor states that this is only a site-specific problem on websites of one or more Plesk users

Plesk 18.0.37 is affected by a Cross Site Request Forgery (CSRF) vulnerability that allows an attacker to insert data on the user and admin panel. NOTE: the vendor states that this is only a site-specific problem on websites of one or more Plesk users

Plesk 8.6.0, when short mail login names (SHORTNAMES) are enabled, allows remote attackers to bypass authentication and send spam e-mail via a message with (1) a base64-encoded username that begins with a valid shortname, or (2) a username that matches a valid password, as demonstrated using (a) SMTP and qmail, and (b) Courier IMAP and POP3.

Multiple SQL injection vulnerabilities in SWSoft Plesk 7.6.1, 8.1.0, 8.1.1, and 8.2.0 for Windows allow remote attackers to execute arbitrary SQL commands via a PLESKSESSID cookie to (1) login.php3 or (2) auth.php3.

Directory traversal vulnerability in top.php3 in SWsoft Plesk for Windows 8.1 and 8.1.1 allows remote attackers to read arbitrary files via a .. (dot dot) in the locale_id parameter.

Multiple directory traversal vulnerabilities in SWsoft Plesk for Windows 7.6.1, 8.1.0, and 8.1.1 allow remote attackers to read arbitrary files via a .. (dot dot) in the locale_id parameter to (1) login.php3 or (2) login_up.php3.