CVE-2020-8227 · cross-distro fix matrix

CVE-2020-8227: Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.

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

Elevated exploitation risk

FIRST EPSS puts CVE-2020-8227's probability of exploitation in the next 30 days at 22% (97th percentile of all CVEs)— well above the noise floor. Prioritize it.

EPSS:22% · 30-day exploit probability97th percentile

Fix per ecosystem

Each block below is a distro release where CVE-2020-8227 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

nextcloud-desktop→ fixed in3.0.1-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y nextcloud-desktop
```

Debian bookworm

Source: Debian Security Tracker

nextcloud-desktop→ fixed in3.0.1-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y nextcloud-desktop
```

Debian trixie

Source: Debian Security Tracker

nextcloud-desktop→ fixed in3.0.1-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y nextcloud-desktop
```

Are YOU affected by CVE-2020-8227?

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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