CVE-2021-3603 · cross-distro fix matrix

CVE-2021-3603: PHPMailer 6.4.1 and earlier contain a vulnerability that can result in untrusted code being called (if such code is injected into the host project's scope by other means). If the $patternselect parameter to validateAddress() is set to 'php' (the default, defined by PHPMailer::$validator), and the gl

Affects 2 Linux releases across 2 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2021-3603 has a known fix. Run the listed command on that distro to remediate.

Debian bookworm

Source: Debian Security Tracker

libphp-phpmailer→ fixed in6.6.3-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libphp-phpmailer
```

Debian trixie

Source: Debian Security Tracker

libphp-phpmailer→ fixed in6.6.3-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libphp-phpmailer
```

Are YOU affected by CVE-2021-3603?

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

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