A vulnerability disclosure policy (VDP), also referred to as a responsible disclosure policy, describes how an organization will handle reports of vulnerabilities submitted by ethical hackers. A VDP must thus be easily identifiable via a simple way, a security.txt notice.

# security.txt file for https://www.twentythree.com/ - more info: https://securitytxt.org/
# (required) Contact email address for security issues
Contact: user@example.com

# (required) Expiration date for the security information herein
Expiration: 2025-06-30T20:53:44+02:00

# (optional) OpenPGP key:
Encryption: https://www.twentythree.com/pgp-key.txt

# (optional) Security policy page:
Policy: https://www.twentythree.com/security-policy

# (optional) Security acknowledgements page:
Acknowledgements: https://www.twentythree.com/hall-of-fame