CVE-2021-22895 · cross-distro fix matrix

CVE-2021-22895: Nextcloud Desktop Client before 3.3.1 is vulnerable to improper certificate validation due to lack of SSL certificate verification when using the "Register with a Provider" flow.

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

Fix per ecosystem

Each block below is a distro release where CVE-2021-22895 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

nextcloud-desktop→ fixed in3.1.1-2+deb11u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y nextcloud-desktop
```

Debian bookworm

Source: Debian Security Tracker

nextcloud-desktop→ fixed in3.3.1-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y nextcloud-desktop
```

Debian trixie

Source: Debian Security Tracker

nextcloud-desktop→ fixed in3.3.1-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y nextcloud-desktop
```

Are YOU affected by CVE-2021-22895?

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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