CVE-2019-12830 : What You Need to Know
Learn about CVE-2019-12830, a vulnerability in MyBB versions before 1.8.21 allowing persistent XSS attacks through the [video] BBCode, enabling attackers to take control of forum accounts. Find mitigation steps and prevention measures.
MyBB version 1.8.21 and earlier are vulnerable to a persistent XSS attack through the [video] BBCode, allowing attackers to take control of forum accounts.
Understanding CVE-2019-12830
This CVE describes a vulnerability in MyBB that enables attackers to exploit a flaw in the Private Message / Post rendering system, leading to persistent XSS attacks.
What is CVE-2019-12830?
Prior to version 1.8.21 of MyBB, attackers could manipulate a vulnerability in the Private Message / Post rendering system, allowing for persistent XSS attacks through the [video] BBCode. This issue, also known as a nested video MyCode problem, enabled attackers to gain control over forum accounts.
The Impact of CVE-2019-12830
The vulnerability in MyBB versions before 1.8.21 could result in attackers taking over forum accounts, posing a significant security risk to users and the forum community.
Technical Details of CVE-2019-12830
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The flaw in MyBB versions prior to 1.8.21 allowed attackers to exploit a parsing flaw in the Private Message / Post renderer, leading to persistent XSS attacks through the [video] BBCode.
Affected Systems and Versions
- MyBB versions before 1.8.21
Exploitation Mechanism
Attackers could manipulate the vulnerability in the Private Message / Post rendering system to inject malicious code through the [video] BBCode, enabling persistent XSS attacks.
Mitigation and Prevention
Protecting systems from CVE-2019-12830 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Upgrade MyBB to version 1.8.21 or later to patch the vulnerability
- Educate users about the risks of clicking on suspicious links or content
Long-Term Security Practices
- Regularly update and patch software to prevent known vulnerabilities
- Implement content security policies to mitigate XSS attacks
Patching and Updates
- Apply patches and updates provided by MyBB to address the vulnerability and enhance system security