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Low 2026-04-28

Security Advisory: DirectAdmin FTP Brute-Force Rate Limiting Bypass

DirectAdmin AlmaLinux 8 AlmaLinux 9 CentOS 7 CloudLinux 8 CloudLinux 9 Debian 11 Debian 12 Ubuntu 20.04 Ubuntu 22.04

Pure-FTPd in DirectAdmin does not enforce login attempt limits when clients reuse the same data connection, allowing accelerated password brute-forcing.

Affected Versions

DirectAdmin 1.671 and earlier

Patched Version

DirectAdmin 1.672

Default Update CMD

yum update -y

Fix Commands

AlmaLinux 9 / CloudLinux 9

cd /usr/local/directadmin
echo 'action=update&value=current' >> data/task.queue
directadmin --reload

CentOS 7 / CloudLinux 7

cd /usr/local/directadmin
echo 'action=update&value=current' >> data/task.queue
directadmin --reload

Ubuntu 22.04 / Debian 12

cd /usr/local/directadmin
echo 'action=update&value=current' >> data/task.queue
directadmin --reload
More Information

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