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ID:7616 - Exploit for Cross-site scripting in MyBB - CVE-2021-27889
ID:7616 - Exploit for Cross-site scripting in MyBB - CVE-2021-27889
Published: April 7, 2022
Vulnerability identifier: #VU51535
Vulnerability risk: Low
CVE-ID: CVE-2021-27889
CWE-ID: CWE-79
Exploitation vector: Remote access
Vulnerable software:
MyBB
MyBB
Link to public exploit:
Vulnerability description
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data within the Nested Auto URL when parsing messages. 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
Install update from vendor's website.