Fyodor's Exploit World:
A large and descriptive exploit archive organized by affected
operating systems.
http://www.insecure.org/sploits.html
L0pht Heavy Industries:
The L0pht is a collaborative group of whitehat hackers who publish
full-disclosure advisories, usually including demonstration
exploits.
http://www.l0pht.com/
Phreak Security:
Exploits and advisories, sorted by operating systems and affected
server software.
http://phreak.com/html/exploits.shtml
DOuiD:
Small security site with several exploits and scanner software.
http://www.DOuiD.8m.com/
USSR Labs:
Security research team that publishes advisories and hosts a large
updated exploit archive sorted by date.
http://www.ussrback.com/
SecuriTeam:
A frequently updated and detailed exploit information archive.
http://www.securiteam.com/exploits/
MIRC Hackers:
Extensive information on IRC channel takeover.
http://www.geocities.com/mirchackers/all.htm
Outpost9:
Exploit archive sorted by operating system.
http://www.outpost9.com/exploits/exploits.html
Freaks Macintosh Archives:
Macintosh Hacking site filled with MacOS compatible exploits.
http://freaky.staticusers.net/
Defaced:
Mail list for news on defaced web sites.
http://www.attrition.org/security/defaced.html
MC2 Security Wire:
Security information site that features a searchable exploit
database that includes links to patch information.
http://securitywire.com/