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Fencer Vulns
high 8.8

CVE-2021-25646 in the critical feed json

Authenticated users can override system configurations in their requests which allows them to execute arbitrary code.

published 2021-01-29 5 y ago modified 2026-06-17 4 mo ago also GHSA-wrqf-rrrw-w3mg , EUVD-2021-1420

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
99.1%
EPSS 99.1% chance of exploitation in 30 days, percentile 99.9%
public exploits
1
Metasploit, plus a Nuclei check

Summary

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.

Patch / fix

  • maven org.apache.druid:druid 0.20.1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-25646 updated cvss 8.8

druid: Authenticated javascript code injection

  • Red Hat OpenShift Container Platform 4 openshift4/ose-metering-hive
    affected: no fix planned “Will not fix”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (Metasploit exploit/linux/http/apache_druid_js_rce)
  2. Published

Exploit prediction

99.06% chance of exploitation in the next 30 days, higher than 99.9% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 9.0 AV:N/AC:L/Au:S/C:C/I:C/A:C
GitHub 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
maven org.apache.druid:druid
<0.20.1
0.20.1

Affected products

  • Apache Software Foundation Apache Druid

Classification

Weakness
  • CWE-732 Incorrect Permission Assignment for Critical Resource

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.