UBBThreads/WWWThreads arbitrary files can be uploaded

ubbthreads-file-upload (8022) The risk level is classified as HighHigh Risk


UBBThreads (formerly WWWThreads) could allow a remote attacker to upload arbitrary files to the message board. A remote attacker could bypass security filters and upload a malicious file to the message board by appending a second file extension to the file name. This could allow an attacker to execute arbitrary code on the Web server.


Bypass Security


Upgrade to the latest version of UBBThreads (5.5 or later), available from the Infopop Web site. See References.


  • BugTraq Mailing List, Thu Jan 11 2001 - 03:36:06 CST: [ WWWThreads, UBBThreads ] Security Hole in upload system.
  • Infopop Web site: UBBThreads Overview.
  • BID-3993: UBBThreads/WWWThreads Arbitrary File Upload Vulnerability
  • CVE-2002-0223: Infopop UBB.Threads 5.4 and Wired Community Software WWWThreads 5.0 through 5.0.9 allows remote attackers to upload arbitrary files by using a filename that contains an accepted extension, but ends in a different extension.
  • OSVDB ID: 13046: UBB.threads / WWWThreads Malformed Extension Arbitrary File Upload

Platforms Affected:

  • InfoPop UBB.threads 5.4
  • WWWThreads WWWThreads 5.0.x


Jan 30, 2002

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