CVE-2021-27890 : What You Need to Know
Learn about CVE-2021-27890, a SQL Injection vulnerability in MyBB versions before 1.8.26, enabling attackers to execute malicious SQL queries. Find mitigation steps and best practices.
SQL Injection vulnerability in MyBB before 1.8.26 allows attackers to execute malicious SQL queries through theme properties in theme XML files.
Understanding CVE-2021-27890
This CVE identifies a security flaw in MyBB that enables SQL Injection attacks, posing a risk to the integrity and confidentiality of data.
What is CVE-2021-27890?
CVE-2021-27890 refers to the SQL Injection vulnerability present in versions of MyBB prior to 1.8.26, where attackers can exploit theme properties in XML files to manipulate SQL queries.
The Impact of CVE-2021-27890
This vulnerability could lead to unauthorized access to sensitive information, data modification, or even total system compromise if exploited by malicious actors.
Technical Details of CVE-2021-27890
The technical aspects of CVE-2021-27890 involve the description of the vulnerability, affected systems and versions, as well as the exploitation mechanism.
Vulnerability Description
The vulnerability arises due to improper input validation in theme properties, allowing malicious SQL queries to be injected and executed within the MyBB application.
Affected Systems and Versions
MyBB versions before 1.8.26 are affected by this SQL Injection flaw, making them susceptible to exploitation by attackers leveraging theme XML files.
Exploitation Mechanism
By including malicious SQL queries within theme properties of XML files, threat actors can manipulate the database queries executed by the MyBB application, leading to data breaches or system compromise.
Mitigation and Prevention
Mitigation strategies and best practices to prevent exploitation of CVE-2021-27890 are crucial for ensuring the security of MyBB installations.
Immediate Steps to Take
Promptly updating MyBB to version 1.8.26 or newer is essential to mitigate the SQL Injection vulnerability and enhance the security posture of the application.
Long-Term Security Practices
Implementing secure coding practices, regular security assessments, and user input validation can help prevent similar vulnerabilities in the future.
Patching and Updates
Regularly monitoring for security patches and updates released by MyBB is recommended to stay protected against emerging threats and vulnerabilities.