Balbooa Gridbox – several critical flaws, updating alone is not enough
Version sécurisée : Balbooa Gridbox 2.20.2 or newer · via Balbooa (account required)
En bref
com_gridbox)De quoi s’agit-il ?
Balbooa Gridbox is a page builder for Joomla from the same vendor as Balbooa Forms. Versions up to and including 2.20.1 became known for several severe security flaws – seven of them carry their own CVE identifier.
Three reach the maximum score of 10 out of 10: a privilege escalation that allowed an administrator account to be created without a login (CVE-2026-65884), resetting anyone else’s password (CVE-2026-65887) and taking over existing accounts (CVE-2026-65888). On top of that come file access without a login, an SQL injection and a bypassable permission check.
This is the decisive point: with these flaws an update is not necessarily enough. If your site ran on a version up to 2.20.1 for any length of time, a planted administrator account may already exist. The update closes the way in – an account that is already there stays until it is removed.
Mon site est-il concerné ? – Comment le vérifier
- Open the back end
Sign in to the Joomla administrator.
- Check the version
Open Extensions›Manage›Manage and filter for "Gridbox". If the version is 2.20.1 or lower, the site is vulnerable.
- Review the user list
Open Users›Manage and look for accounts you did not create yourself – especially ones with an odd user name and a throwaway address. Do not delete blindly; check first.
- Go through the extensions
In Extensions›Manage also review the plugin list for entries you never installed.
Comment corriger la faille
- Before updating: back up
Back up files and database before you update.
- Open the update centre
Go to System›Update›Extensions and click Check for updates.
- Update Gridbox
Select the entry and update to 2.20.2 or newer. 2.20.1 is not enough.
- Afterwards: check accounts
Only after the update, go through the user list – an account created earlier does not disappear on its own.
Source officielle : via Balbooa (account required). Assurez-vous d’avoir au minimum la version Balbooa Gridbox 2.20.2 or newer.
Le site a-t-il déjà été piraté ?
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Sources & liens utiles
- CVE-2026-65884 – privilege escalationSeverity 10 out of 10
- CVE-2026-65887 – resetting other passwordsSeverity 10 out of 10
- CVE-2026-65888 – account takeoverSeverity 10 out of 10
- Balbooa (vendor)Source of the safe version 2.20.2
Les informations officielles de l’éditeur concerné font toujours foi. Cette page résume de manière neutre des informations accessibles publiquement.
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