CVE-2025-27221 · cross-distro fix matrix

CVE-2025-27221: In the URI gem before 1.0.3 for Ruby, the URI handling methods (URI.join, URI#merge, URI#+) have an inadvertent leakage of authentication credentials because userinfo is retained even after changing the host.

Affects 3 Linux releases across 5 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2025-27221 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

ruby2.7→ fixed in2.7.4-1+deb11u5urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y ruby2.7
```
rubygems→ fixed in3.2.5-2+deb11u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y rubygems
```

Debian bookworm

Source: Debian Security Tracker

rubygems→ fixed in3.3.15-2+deb12u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y rubygems
```

Debian trixie

Source: Debian Security Tracker

ruby3.3→ fixed in3.3.7-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y ruby3.3
```
rubygems→ fixed in3.6.6-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y rubygems
```

Are YOU affected by CVE-2025-27221?

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-2025-27221dropped 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)