UpHeron
All vulnerabilities

Servers and applications

CVE-2008-4930

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.

Severity
Medium 5.0
Published
4 Nov 2008
Last changed
16 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
1.2% in the next 30 daysHigher than 67% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Improper input validation (CWE-20)
Attack
Over the network · No login needed
Attacker can
Change some data
CVSS vector
AV:N/AC:L/Au:N/C:N/I:P/A:N
Sources
NVD

Affected software

SoftwareAffected versions
MyBBServers and applications · cpe:a:mybb:mybb
  • Version 1.4.2

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2008-4930
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2008-4930