CVE-2021-44528 · cross-distro fix matrix

CVE-2021-44528: A open redirect vulnerability exists in Action Pack >= 6.0.0 that could allow an attacker to craft a "X-Forwarded-Host" headers in combination with certain "allowed host" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website.

Affects 3 Linux releases across 3 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2021-44528 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

rails→ fixed in2:6.0.3.7+dfsg-2+deb11u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y rails
```

Debian bookworm

Source: Debian Security Tracker

rails→ fixed in2:6.1.4.6+dfsg-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y rails
```

Debian trixie

Source: Debian Security Tracker

rails→ fixed in2:6.1.4.6+dfsg-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y rails
```

Are YOU affected by CVE-2021-44528?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

curl https://mindsparkstack.com/scan.sh | bash

Form-based quickscan View on NVD

Continuous monitoring beats manual checking

CVE-2021-44528dropped silently in your distro's update channel. Every new CVE is the same story. StackPatch runs the matcher hourly against all 5 sources and emails the exact remediation when something new applies to one of your servers. $99 lifetime, 50 founder seats, 30-day refund.

See StackPatch ($99 lifetime)