Known exploited · Sonatype

CVE-2020-10199: Sonatype Nexus Repository Remote Code Execution Vulnerability

What it is

Sonatype Nexus Repository contains an unspecified vulnerability that allows for remote code execution.

Added November 3, 2021Due May 3, 2022CISA KEV catalog 2026.10.01

Vendor: Sonatype
Product: Nexus Repository
Added to KEV: November 3, 2021
CISA due date: May 3, 2022
Ransomware use: Unknown
Weakness: CWE-917: Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')

What CISA requires

Apply updates per vendor instructions.

Find every instance of Nexus Repository you run, including the forgotten ones, and check its version against the vendor advisory.
Apply the vendor's fix or mitigation, before May 3, 2022 if you are bound by CISA's deadline, sooner if it faces the internet.
Assume it was tried against you already: look for signs of exploitation from the date it was added, not from the day you patched.
Until every instance is patched, block the attack at the edge: a WAF in blocking mode stops Log4Shell (JNDI lookup) payloads.

The Dome

The Dome's WAF runs the OWASP Core Rule Set in blocking mode and stops Log4Shell (JNDI lookup) payloads before they reach your application.

T Academy

Security engineering on real hosts in the browser, every objective checked on the machine. The first two lessons of Linux 1 are free.

Source: CISA Known Exploited Vulnerabilities Catalog (public domain), catalog version 2026.10.01.