The vulnerabilities could allow attackers to execute rogue PHP code on web servers The security team of the popular Drupal content management system worked with the maintainers of three third-party modules to fix critical vulnerabilities that could allow attackers to take over websites.The flaws allow attackers to execute rogue PHP code web servers that host Drupal websites with the RESTWS, Coder or Webform Multiple File Upload modules installed. These modules are not part of Drupal’s core, but are used by thousands of websites.The RESTWS module is a popular tool for creating Rest application programming interfaces (APIs) and is currently installed on over 5,800 websites. Unauthenticated attackers can exploit the remote code execution vulnerability in its page callback functionality by sending specially crafted requests to the website.There is no mitigating factor and upgrading to the module’s latest version, which fixes the flaw, is highly recommended. Coder is another popular module and allows Drupal administrators to check their code against various coding standards and best practices. It is installed on over 4,950 websites and it too contains a remote code execution vulnerability that can be exploited by unauthenticated attackers.The module does not even need to be enabled in order for the flaw to be exploitable, its mere presence on the file system being enough. Finally, the Webform Multiple File Upload module allows website administrators to receive multiple files from users and is installed on some 3,000 websites. It too has a vulnerability that could lead to remote code execution, but the flaw’s exploitation depends on which libraries are available on the website.Furthermore, an attacker needs to be able to submit a web form with specifically crafted input and, depending on the site configuration, this might require authentication. Since there are mitigating factors that could limit the flaw’s impact, it was rated only as critical instead of highly critical.The Drupal CMS powers over one million websites, including 1 in 10 of the most popular 10,000 websites on the Internet that are based on a known content management system. It is commonly used by businesses. Related content news Arm patches bugs in Mali GPUs that affect Android phones and Chromebooks The vulnerability with active exploitations allows local non-privileged users to access freed-up memory for staging new attacks. By Shweta Sharma Oct 03, 2023 3 mins Android Security Android Security Mobile Security news UK businesses face tightening cybersecurity budgets as incidents spike More than a quarter of UK organisations think their cybersecurity budget is inadequate to protect them from growing threats. By Michael Hill Oct 03, 2023 3 mins CSO and CISO Risk Management news Cybersecurity experts raise concerns over EU Cyber Resilience Act’s vulnerability disclosure requirements Open letter claims current provisions will create new threats that undermine the security of digital products and individuals. By Michael Hill Oct 03, 2023 4 mins Regulation Compliance Vulnerabilities feature The value of threat intelligence — and challenges CISOs face in using it effectively Knowing the who, what, when, and how of bad actors and their methods is a boon to security, but experts say many teams are not always using such intel to their best advantage. By Mary K. Pratt Oct 03, 2023 10 mins CSO and CISO Advanced Persistent Threats Threat and Vulnerability Management Podcasts Videos Resources Events SUBSCRIBE TO OUR NEWSLETTER From our editors straight to your inbox Get started by entering your email address below. Please enter a valid email address Subscribe