CVE-2020-15227 Remote Code Execution vulnerability

What is CVE-2020-15227?

CVE-2020-15227 is a high-severity code injection vulnerability in Debian Debian Linux, published on 1 Oct 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Nette versions before 2.0.19, 2.1.13, 2.2.10, 2.3.14, 2.4.16, 3.0.6 are vulnerable to an code injection attack by passing specially formed parameters to URL that may possibly leading to RCE. Nette is a PHP/Composer MVC Framework.

Weakness: CWE-94, CWE-74

Which versions are affected by CVE-2020-15227?

12 open source packages ship an affected version, including nette/application. It affects 2 products.

Products include Debian Debian Linux, Nette Application.

How do I fix CVE-2020-15227?

Upgrade nette/application to a fixed version for your release line: 2.0.19, 2.1.13, 2.2.10 or 2.3.14.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2020-15227 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-15227 exists.

Public exploit code: 1 Nuclei template and 3 proofs of concept on GitHub.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DLA-2617-1, GHSA-8gv3-3j7f-wg94, UBUNTU-CVE-2020-15227, USN-5983-1.