CVE-2025-27773 · cross-distro fix matrix

CVE-2025-27773: The SimpleSAMLphp SAML2 library is a PHP library for SAML2 related functionality. Prior to versions 4.17.0 and 5.0.0-alpha.20, there is a signature confusion attack in the HTTPRedirect binding. An attacker with any signed SAMLResponse via the HTTP-Redirect binding can cause the application to accept

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

Fix per ecosystem

Each block below is a distro release where CVE-2025-27773 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

simplesamlphp→ fixed in1.19.0-1+deb11u2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y simplesamlphp
```

Debian bookworm

Source: Debian Security Tracker

simplesamlphp→ fixed in1.19.7-1+deb12u2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y simplesamlphp
```

Are YOU affected by CVE-2025-27773?

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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