SB2018020837 - Multiple vulnerabilities in MyBB

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Cross-site request forgery (CVE-ID: CVE-2018-7305)

The vulnerability allows a remote attacker to perform cross-site request forgery attacks.

The vulnerability exists due to insufficient validation of the HTTP request origin. A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website.

2) Cross-site scripting (CVE-ID: CVE-2018-6844)

The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data when processing the Title or Description field on the Edit Forum screen. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References

• https://websecnerd.blogspot.in/2018/02/mybb-forum-1_21.html
• https://websecnerd.blogspot.com/2018/02/mybb-forum-1.html