What’s Vulnerable › Vulnerabilities

CVE-2008-4930

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2008-11-04 · updated 2026-06-16
• Weakness: CWE-20

Description

MyBB (aka MyBulletinBoard) 1.4.2 does not properly handle an uploaded file with a nonstandard file type that contains HTML sequences, which allows remote attackers to cause that file to be processed as HTML by Internet Explorer's content inspection, aka "Incomplete protection against MIME-sniffing." NOTE: this could be leveraged for XSS and other attacks.

Affected products

• mybb: 1.4.2

References

• http://archives.neohapsis.com/archives/bugtraq/2008-10/0203.html
• http://archives.neohapsis.com/archives/fulldisclosure/2008-10/0472.html
• http://www.openwall.com/lists/oss-security/2008/11/01/2
• http://archives.neohapsis.com/archives/bugtraq/2008-10/0203.html
• http://archives.neohapsis.com/archives/fulldisclosure/2008-10/0472.html
• http://www.openwall.com/lists/oss-security/2008/11/01/2

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