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Blesta Security Advisory (20240208)

08th Feb 2024

Dear Blesta.Store Clients!

The Blesta Development Team has published a SECURITY ADVISORY!

  • We have uploaded a new Blesta version addressing this to the
    downloads section: BLESTA-5.9.2
  • In addition we have also uploaded patches for a few supported
    blesta versions (in the folder called:


Several security issues affecting Blesta versions 5.0.0 through 5.9.1
have been identified.
There is no evidence to suggest that these vulnerabilities are
publicly known or being exploited, but you should take action now.

A path traversal vulnerability may lead to account compromise and RCE
(Remote Code Execution) through vulnerability chaining.
We recommend applying the appropriate patch for your release as soon
as possible, or by upgrading to version 5.9.2.
Given the compounding nature of these vulnerabilies, we give this an
impact rating of Critical.


  • If you are running version 5.7.x, apply the 5.7.2 patch.
  • If you are running version 5.8.x, apply the 5.8.3 patch.
  • If you are running version 5.9.x, apply the 5.9.2 patch.
  • If you are running version 5.0.x through 5.6.x, upgrade to 5.9.2


It is best to upgrade to 5.9.2 or apply the appropriate patch.
However, if you are running an affected unsupported version of Blesta
(version 5.0 through 5.6), or you need more time to upgrade, you may
take the following immediate steps to mitigate.

Visit Settings > System > General and note the location of your
“Uploads Directory”.
Assuming your uploads directory is “/path/to/uploads/” check the
directory for your company ID (typically “1”) and see if you have
a “themes” directory. If the directory exists, delete the
directory. Example locations for this directory are:
“/path/to/uploads/1/themes”, “/path/to/uploads/2/themes”, etc.
Only users with addon-companies will have any directories other than
“1” within the uploads directory. Ensure “themes” is deleted
from each.

If your logo dissappears, you may need to visit Settings > Company >
Look and Feel > Customize and set your logo using “Set Logo URL”,
not “Upload Logo”. NOTE that this may result in the “themes”
directory being re-created. If you perform this step, check for and
delete the “themes” directory again.

We would also highly recommend ensuring that Two-Factor Authentication
is enabled for all Staff accounts. Staff can set up Two-Factor
Authentication under “My Info” using a token like Google
Authenticator (for iOS/Android).


Please note that the mentioned "RCE" is only possible via
vulnerability chaining and does not appear to be exploitable in a
"stand alone" kind of way (according to the blesta team).

Kind Regards
The Blesta.Store Team

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Release: CMSPro Version 3.0.0

16th Sep 2023

Version 3.0 of the CMSPro Plugin is out now!

Clients can find the download after signing into their account under "Downloads" > "Blesta.Store Plugins" > CMSPro.

Kind Regards

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Release: Plugins LoginHistory and ClientDetails

16th Sep 2023

Today we are releasing two plugins for blesta.

  • ★ Client Login History ★ (Easily check and extract your Clients login history (ip-addresses, successful/failed attempts/...)
  • ★ Client Contact History ★ (Easily check and extract your Clients Details history (Contact Detail Changes,....))

The downloads can be accessed signing into your account under "Downloads" > "Blesta.Store Plugins" > CMSPro.

Read More