• Debian 11 is approaching its end-of-life (vendor EOL date - August 31, 2026). Plesk Obsidian 18.0.80 will be the last release to support it.
    If you are running Plesk Obsidian on Debian 11, we recommend you upgrade those servers to Debian 12 using our dist-upgrade tool.
  • We plan to deprecate and remove the support for XML RPC protocol versions earlier than 1.6.9.1 in Plesk Obsidian 18.0.82. We strongly recommend that you update all existing integrations using earlier versions of the XML RPC protocol to comply with the version 1.6.9.1 specification.

Plesk Login Transmits credentials in cleartext

Deoxymono

New Pleskian
Another PCI scan failing from Security Metrics:

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Protocol: TCP | Port: 8880 | Program: cddbp-alt | Score: 4.0

Description: Web Server Uses Plain Text Authentication Forms

Synoposis: The remote web server might transmit credentials in cleartext.

Impact: The remote web server contains several HTML form fields containing an input of type 'password' which transmit their information to a remote web server in cleartext. An attacker eavesdropping the traffic between web browser and server may obtain logins and passwords of valid users.

Page: /login_up.php3
Destination page: /login_up.php3
Input name: passwd

Other references: CWE:522, CWE:523, CWE:718, CWE:724

Resolution: Make sure that every sensitive form transmits content over HTTPS. Risk Factor: Medium/ CVSS2 Base Score: 4.0 AV:N/AC:H/Au:N/C/I:N/A:N

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Now this appears to be referencing the default login page for Plesk (login_up.php3). However it definitely uses HTTPS so I don't understand the problem here.

Any help anyone can provide with this issue would be greatly appreciated.
 
I fixed this issue simply by blocking port 8880 through the Plesk firewall. It seems it is not needed unless you want to use the Plesk panel without https.
 
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