CVE-2020-10203 Persistent Cross-Site scripting in Nexus Repository Manager

What is CVE-2020-10203?

CVE-2020-10203 is a medium-severity cross-site scripting vulnerability in n/a, published on 1 Apr 2020. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

Sonatype Nexus Repository before 3.21.2 allows XSS.

Weakness: CWE-79

Which versions are affected by CVE-2020-10203?

2 open source packages ship an affected version, including org.sonatype.nexus:nexus-core. It affects 1 product.

Products include Sonatype Nexus.

How do I fix CVE-2020-10203?

Upgrade org.sonatype.nexus:nexus-core to 3.21.2 or later.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2020-10203 being exploited?

There is no known exploitation of CVE-2020-10203 in the wild and no public exploit code.

Other vulnerabilities in n/a

• CVE-2020-10199 Sonatype Nexus Repository Remote Code Execution Exploited High 8.8
• CVE-2020-11444 Missing authorization in n/a High 8.8
• CVE-2014-9389 Path traversal in n/a High 7.5
• CVE-2014-2034 Auth bypass in n/a High 7.5
• CVE-2014-0792 Deserialization in n/a High 7.5

Sources

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

Also known as GHSA-3944-787c-f852.