Drupal developers have announced the release of updates that patch several vulnerabilities in the open source content management system (CMS).
Drupal has released four advisories that describe four types of vulnerabilities. One of them has been rated “critical” and the other three “moderately critical.” Drupal uses the NIST Common Misuse Scoring System to rate vulnerabilities — instead of CVSS — with flaws being rated “less critical,” “moderately critical,” “critical” and “highly critical.”
The “critical” vulnerability, tracked as CVE-2022-25277, affects Drupal 9.3 and 9.4. The issue impacts the Drupal core and it can lead to arbitrary PHP code execution on Apache web servers by uploading specially crafted files.
Drupal developers pointed out that only Apache web servers are impacted and only with specific configurations. They have advised website admins to check their server for possible signs of compromise.
The three “moderately critical” security holes also impact the Drupal core. Their exploitation can lead to cross-site scripting (XSS) attacks, information disclosure, or access bypass.
Patches for these vulnerabilities are included in Drupal 9.4.3 and 9.3.19. The information disclosure flaw also impacts Drupal 7 and a fix has been included in version 7.91.
The US Cybersecurity and Infrastructure Security Agency (CISA) has advised Drupal users to review the advisories and install the updates.
While Drupal websites are not as targeted as WordPress sites, several of the vulnerabilities found in the CMS in the past years were exploited by malicious actors, including for spam campaigns and to hack websites and deliver malware.
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Related: Drupal Releases Out-of-Band Security Updates Due to Availability of Exploits