In order of appearance…
Exploits Database by Offensive Security
The Exploit Database – Exploits, Shellcode, 0days, Remote Exploits, Local Exploits, Web Apps, Vulnerability Reports, Security Articles, Tutorials and more.
Vulnerability & Exploit Database | Rapid7
The Rapid7 Vulnerability and Exploit Database is a curated repository of vetted computer software exploits and exploitable vulnerabilities. The vulnerability and exploit database is updated frequently and contains the most recent security research.
Vulnerability Database
vuldb.com is the “Number one vulnerability database documenting and explaining security vulnerabilities and exploits since 1970.” LOL!
CXSECURITY
CXSECURITY (Independent information about security) is a huge collection of information on data communications safety. Its main objective is to inform about errors in various applications.
CVE Details
CVEdetails.com is a free CVE security vulnerability database/information source. You can view CVE vulnerability details, exploits, references, metasploit modules, full list of vulnerable products and cvss score reports and vulnerability trends over time.
ExploitBox
ExploitBox.io Is A Playground & Labs For Hackers, Bug Hunters, Researchers & Other Security Folks.
Legal Hackers
Legal Hackers is: Information Security. Security Research. Legal/Ethical Hacking. Penetration Testing.