Description
Interpretation conflict in PostNuke 0.761 and earlier allows remote attackers to conduct cross-site scripting (XSS) attacks via HTML tags with a trailing "<" character, which is interpreted as a ">" character by some web browsers but bypasses the blacklist protection in (1) the pnVarCleanFromInput function in pnAPI.php, (2) the pnSecureInput function in pnAntiCracker.php, and (3) the htmltext parameter in an edituser operation to user.php.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- PostNuke 0.6x/0.7x NS-Languages Module - 'language' Cross-Site Scripting EDB-27254 · webapps · Feb 21, 2006 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- ADV-2006-0673 vdb-entry
- postnuke-user-nslanguages-xss(24823) vdb-entry
- 16752 vdb-entry
- http://news.postnuke.com/index.php?name=News&file=article&sid=2754
- 20060219 Multiple vulnerabilities in PostNuke <= 0.761 mailing-list
- 18937 third-party-advisory
- 454 third-party-advisory