CVE-2021-25646 (GCVE-0-2021-25646)

Vulnerability from cvelistv5 – Published: 2021-01-29 19:15 – Updated: 2025-02-13 16:27
VLAI Shadowserver Previdian
Title
Authenticated users can override system configurations in their requests which allows them to execute arbitrary code.
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.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • Remote code execution
Assigner
apache CNA under the mitre root
CNA scorecard B 76/100 over 1197 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Apache Software Foundation Apache Druid Affected: 0.20.0 and earlier , ≤ 0.20.0 (custom)
guessed Create a notification for this product.
Credits
This issue was discovered by Litch1 from the Security Team of Alibaba Cloud.
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: e8d91e0a-d109-464e-91d4-edc39fdcad48

Vulnerability ID: CVE-2021-25646

Status: Confirmed

Status Updated: 2026-11-07 00:00 UTC

Exploited: Yes

Characteristics
Severity: 88.0
Timestamps
First Seen: 2023-10-14
Asserted: 2023-10-14
Last Seen: 2026-11-07
Scope
Asset Exposure: ['internet-facing']
Notes: Affected: Apache / Druid | Class: database | Severity: High (CVSS 8.8) | IoT: no | In CISA KEV: no | Honeypot connections on 2026-11-07: 9
Evidence

Type: Honeypot

Signal: In The Wild Attempts

Confidence: 70%

Source: shadowserver

Details
1D 1
Iot no
Feed Shadowserver Foundation honeypot/exploited-vulnerabilities
Type http-scan
Class database
7D Avg 22
Vendor Apache
30D Avg 12
90D Avg 6
Product Druid
Cisa Kev no
Connections 9
Observation Date 2026-11-07
Vulnerability Class CVSS
Vulnerability Score 8.8
Vulnerability Severity High
References
Created: 2026-07-01 05:53 UTC | Updated: 2026-11-09 01:00 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 905e2533-4c67-466b-b8e0-ea3631e85ad5

Vulnerability ID: CVE-2021-25646

Status: Confirmed

Status Updated: 2025-04-28 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2025-04-28
Asserted: 2025-04-28
Scope
Notes: KEVIntel entry: Authenticated users can override system configurations in their requests which allows them to execute arbitrary code. | Affected: Apache Software Foundation / Apache Druid | CVSS: 8.8 (HIGH) | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title Authenticated users can override system configurations in their requests which allows them to execute arbitrary code.
Vendor Apache Software Foundation
Product Apache Druid
Added Date 2025-04-28T00:00:00.000Z
Cvss Score 8.8
Epss Score None
Cvss Severity HIGH
Epss Percentile None
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-06-23 11:13 UTC | Updated: 2026-06-23 11:13 UTC
Show details on NVD website
To clipboard 

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            {
              "name": "[druid-dev] 20210331 Regarding the 0.21.0 release",
              "refsource": "MLIST",
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            {
              "name": "http://packetstormsecurity.com/files/162345/Apache-Druid-0.20.0-Remote-Command-Execution.html",
              "refsource": "MISC",
              "url": "http://packetstormsecurity.com/files/162345/Apache-Druid-0.20.0-Remote-Command-Execution.html"
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        "source": {
          "discovery": "UNKNOWN"
        },
        "work_around": [
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            "lang": "en",
            "value": "Users should upgrade to Druid 0.20.1. Whenever possible, network access to cluster machines should be restricted to trusted hosts only."
          }
        ]
      }
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  },
  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
    "cveId": "CVE-2021-25646",
    "datePublished": "2021-01-29T19:15:12.000Z",
    "dateReserved": "2021-01-21T00:00:00.000Z",
    "dateUpdated": "2025-02-13T16:27:49.264Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-25646",
      "date": "2026-11-09",
      "epss": "0.99062",
      "percentile": "0.99932"
    },
    "nvd": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
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                    "matchCriteriaId": "94B16329-4DFA-4081-86E3-7434D7BB2B46",
                    "versionEndIncluding": "0.20.0",
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "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."
          },
          {
            "lang": "es",
            "value": "Apache Druid incluye la capacidad de ejecutar c\u00f3digo JavaScript proporcionado por el usuario insertado en varios tipos de peticiones.\u0026#xa0;Esta funcionalidad est\u00e1 pensada para su uso en entornos de alta confianza y est\u00e1 deshabilitada por defecto.\u0026#xa0;Sin embargo, en Druid versiones 0.20.0 y anteriores, es posible para un usuario autenticado enviar una petici\u00f3n especialmente dise\u00f1ada para obligar a Druid a ejecutar c\u00f3digo JavaScript proporcionado por el usuario para esa petici\u00f3n, independientemente de la configuraci\u00f3n del servidor.\u0026#xa0;Esto puede ser aprovechado para ejecutar c\u00f3digo en la m\u00e1quina objetivo con los privilegios del proceso del servidor Druid"
          }
        ],
        "id": "CVE-2021-25646",
        "lastModified": "2024-11-21T05:55:12.470",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "HIGH",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "NETWORK",
                "authentication": "SINGLE",
                "availabilityImpact": "COMPLETE",
                "baseScore": 9.0,
                "confidentialityImpact": "COMPLETE",
                "integrityImpact": "COMPLETE",
                "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C",
                "version": "2.0"
              },
              "exploitabilityScore": 8.0,
              "impactScore": 10.0,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
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                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 8.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
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              "exploitabilityScore": 2.8,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
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        "published": "2021-01-29T20:15:12.997",
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        "sourceIdentifier": "security@apache.org",
        "vulnStatus": "Modified",
        "weaknesses": [
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              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
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    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T16:07:10+00:00",
      "cve": "CVE-2021-25646",
      "id": "CVE-2021-25646",
      "initial_release_date": "2021-01-29T00:00:00+00:00",
      "product_status:known_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "druid: Authenticated javascript code injection",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-25646.json",
      "version": "3"
    }
  }
}



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