CyberRota Analysis
AI-GeneratedThe ACP Mass Mail module in MyBB versions prior to 1.8.40 is vulnerable to request forgery, allowing same-site attackers to create draft entries from archived mailings through specially crafted URLs. This could lead to unauthorized manipulation of mailing entries, potentially impacting the integrity of communications within the forum. Administrators using affected versions should prioritize updating to 1.8.40 to mitigate this risk.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
Note: these links are listed for security research and verification purposes only.
Original NVD Description
MyBB is free and open source forum software. Prior to 1.8.40, the ACP Mass Mail module does not validate certain requests correctly, allowing same-site attackers to create draft entries from archived entries by embedding a specially crafted URL. The Resend route in Admin CP, Users & Groups, Mass Mail, Mass Mailing Archive duplicates archived mailing entries into new drafts with mybb_massemails.status set to 0 on GET requests without request forgery protection. The uniquely identifying implementation details include Users & Groups → Mass Mail → Mass Mailing Archive, mybb_massemails.status = 0, and admin/modules/user/mass_mail.php. This issue is fixed in version 1.8.40.