A big safety vulnerability has been recognized and patched within the extensively used File Supervisor plugin for WordPress, affecting over 1 million web sites. The vulnerability is rated 8.1 out of 10 in severity and will doubtlessly enable unauthenticated attackers to achieve entry to delicate info together with knowledge contained in web site backups.
Unauthenticated Assault Vulnerabilities
What makes this vulnerability a excessive concern is the truth that a hacker doesn’t want login credentials with a purpose to launch an assault, which is what is supposed by the time period unauthenticated.
Within the context of a WordPress plugin vulnerability, an attacker can achieve entry to delicate info with no need to log in or authenticate their id. This type of assault exploits a safety hole the File Supervisor plugin known as Use of Insufficiently Random Values.
The Frequent Weak point Enumeration safety web site describes this type of vulnerability:
“The product makes use of insufficiently random numbers or values in a safety context that will depend on unpredictable numbers.
When product generates predictable values in a context requiring unpredictability, it might be attainable for an attacker to guess the subsequent worth that shall be generated, and use this guess to impersonate one other consumer or entry delicate info.”
This class of vulnerability is because of a weak spot within the File Supervisor plugin’s backup filename technology algorithm. The algorithm combines a timestamp with a four-digit random quantity however that quantity of randomization shouldn’t be random sufficient to maintain an attacker from efficiently guessing the file names and as a consequence permits attackers to achieve entry to backup information in configurations the place there isn’t any .htaccess file to dam entry.
Use of Insufficiently Random Values Vulnerability
The Use of Insufficiently Random Values vulnerability kind is a flaw within the plugin that depends on producing random and unpredictable file numbers with a purpose to stop attackers from guessing what a backup file identify is. The plugins lack of randomization permits an attacker to determine the file names and achieve entry to delicate info.
Weak Variations Of The Plugin
The safety vulnerability is present in all variations as much as and together with 7.2.1 and was patched within the newest replace of the plugin, with the discharge of model 7.2.2.
The replace, as famous within the File Supervisor WordPress Plugin Changelog Documentation, features a repair for the safety problem. Customers of the plugin are strongly suggested to think about updating to this newest model to guard their web sites from potential exploits.
Learn the Wordfence advisory for extra info:
File Supervisor <= 7.2.1 – Delicate Data Publicity through Backup Filenames
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