CVE-2018-9861 Explained : Impact and Mitigation
Learn about CVE-2018-9861, a cross-site scripting vulnerability in the Enhanced Image plugin for CKEditor affecting Drupal versions 8.4.7 and earlier, and 8.5.x before 8.5.2. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
This CVE article provides details about a cross-site scripting vulnerability in the Enhanced Image plugin for CKEditor, affecting Drupal versions 8.4.7 and earlier, as well as 8.5.x before 8.5.2.
Understanding CVE-2018-9861
This vulnerability allows malicious actors to execute arbitrary web scripts by exploiting a manipulated IMG element.
What is CVE-2018-9861?
The Enhanced Image plugin for CKEditor, used in Drupal versions 8.4.7 and earlier, as well as 8.5.x before 8.5.2, is vulnerable to cross-site scripting (XSS) attacks. The flaw exists in CKEditor versions 4.5.10 through 4.9.1, with a fix implemented in version 4.9.2.
The Impact of CVE-2018-9861
The vulnerability enables remote attackers to inject malicious web scripts through specially crafted IMG elements, potentially leading to unauthorized access or data theft.
Technical Details of CVE-2018-9861
This section delves into the specifics of the vulnerability.
Vulnerability Description
The XSS vulnerability in the Enhanced Image plugin for CKEditor allows attackers to inject arbitrary web scripts, posing a significant security risk to affected systems.
Affected Systems and Versions
- Drupal versions 8.4.7 and earlier
- Drupal 8.5.x before 8.5.2
- CKEditor versions 4.5.10 through 4.9.1
Exploitation Mechanism
Malicious actors exploit the vulnerability by manipulating IMG elements to inject unauthorized web scripts, potentially compromising the integrity and security of the affected systems.
Mitigation and Prevention
Protecting systems from CVE-2018-9861 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update CKEditor to version 4.9.2 or later to mitigate the vulnerability.
- Apply security patches provided by Drupal for the affected versions.
Long-Term Security Practices
- Regularly monitor and update all software components to address security vulnerabilities promptly.
- Implement web application firewalls and input validation mechanisms to prevent XSS attacks.
Patching and Updates
- Stay informed about security advisories from CKEditor, Drupal, and other relevant sources.
- Regularly apply security patches and updates to all software components to ensure protection against known vulnerabilities.