Admiral EmailClub 1.05 is an email server software used by some organizations for sending and receiving emails. This vulnerability allows remote attackers to execute arbitrary commands via a long "From" header in an e-mail message, potentially leading to unauthorized access and data tampering.
You're affected if you use Admiral EmailClub version 1.05. Check with your IT department or email administrator if your organization uses this software. Note that this is a niche product, so if you don't recognize the name, you're probably not affected.
Upgrade to a newer version of Admiral EmailClub (version 1.06 or later) from the vendor's website.
- Immediately restrict network access to your email server instance (firewall it from the public internet).
- Monitor for suspicious email activity and audit admin account activity for unauthorized token creation.