In our role as Outsourced hosting support specialists for web hosts, we manage web servers with various control panels and billing portals such as WHMCS, Blesta, HostBill, etc.
Blesta is a customer management, billing, and support system for web hosting providers, which is being used by many web hosts nowadays.
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What causes open_basedir restriction error in Blesta
The restriction ‘open_basedir’ in PHP is a feature to restrict the directories a PHP application can access. This is a security feature to protect server files and to limit access for a software to only its own files.
So, even if an attacker gains access to a vulnerable application, it cannot access critical server files, if this restriction is in place. Instead it will see the error ‘open_basedir restriction in effect’.
If a file is outside the path defined by open_basedir, PHP cannot open it. This restriction, if enabled, can affect all PHP software in the server, including Blesta.
So, if while uploading a file or accessing any attachment in Blesta, gives the following error, it means that the folder is restricted due to open_basedir restriction, in the server.
realpath(): open_basedir restriction in effect. File(C:\Program Files (x86)\Parallels\Plesk\Additional\PleskPHP56\ext) is not within the allowed path(s): (D:/PLESKVHOST/vhosts/domain.com\;C:\Windows\Temp\) on line 2 in D:\PLESKVHOST\vhosts\domain.com\httpdocs\billing\blesta\app\app_model.php
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How to fix open_basedir restriction error in Blesta
To resolve the error due to open_basedir restriction, there are mainly two options.
- Disable open_basedir restriction – open_basedir can be disabled either globally or specifically for one user, which is however something we don’t recommend due to security constraints.
- Add the required path to the ‘allowed’ paths in open_basedir restriction list.
The folder in question can be obtained from the error message shown in Blesta. In this scenario, we need to specify “C:\Program Files (x86)\Parallels\Plesk\Additional\PleskPHP56\ext” within its path in the php.ini, with an entry such as:
open_basedir = "C:\Program Files (x86)\Parallels\Plesk\Additional\PleskPHP56\ext;C:\Windows\Temp"
Once this is done, we use a phpinfo check to confirm that the setting has taken effect. Now Blesta uploads and file access would work fine, without open_basedir restriction error for that folder.
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