CVE-2021-27578 Cross Site Scripting in markdown interpreter

What is CVE-2021-27578?

CVE-2021-27578 is a medium-severity cross-site scripting vulnerability in Apache Zeppelin, published on 2 Sep 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Cross Site Scripting vulnerability in markdown interpreter of Apache Zeppelin allows an attacker to inject malicious scripts. This issue affects Apache Zeppelin Apache Zeppelin versions prior to 0.9.0.

Weakness: CWE-79

Which versions are affected by CVE-2021-27578?

2 open source packages ship an affected version, including org.apache.zeppelin:zeppelin. It affects 1 product.

Products include Apache Zeppelin.

How do I fix CVE-2021-27578?

Upgrade org.apache.zeppelin:zeppelin to 0.9.0 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-2021-27578 being exploited?

There is no known exploitation of CVE-2021-27578 in the wild and no public exploit code.

Other vulnerabilities in Apache Zeppelin

• CVE-2024-31864 Apache Zeppelin: Remote code execution by adding malicious JDBC connection string Critical 9.8
• CVE-2024-31866 Apache Zeppelin: Interpreter download command does not escape malicious code injection Critical 9.8
• CVE-2019-10095 bash command injection in spark interpreter Critical 9.8
• CVE-2018-1317 Improper Authentication in Apache Zeppelin High 8.8
• CVE-2017-12619 Session Fixation in Apache Zeppelin High 8.1

Sources

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

Also known as GHSA-mf7q-gw5f-q8jj.