CVE-2025-54812 · cross-distro fix matrix

CVE-2025-54812: Improper Output Neutralization for Logs vulnerability in Apache Log4cxx. When using HTMLLayout, logger names are not properly escaped when writing out to the HTML file. If untrusted data is used to retrieve the name of a logger, an attacker could theoretically inject HTML or Javascript in order to

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

Fix per ecosystem

Each block below is a distro release where CVE-2025-54812 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

log4cxx→ fixed in0.11.0-2+deb11u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y log4cxx
```

Debian bookworm

Source: Debian Security Tracker

log4cxx→ fixed in1.0.0-1+deb12u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y log4cxx
```

Debian trixie

Source: Debian Security Tracker

log4cxx→ fixed in1.4.0-1+deb13u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y log4cxx
```

Are YOU affected by CVE-2025-54812?

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.

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