CVE-2021-27644Network attack vector

Authenticated code execution via unsafe Connector/J deserialization

Published Nov 1, 2021 · Updated Aug 3, 2024

Code execution in Apache DolphinScheduler before 1.3.6 allows remote authenticated users to execute code via MySQL JDBC parameters. The data-source connector passes attacker-controlled connection properties to MySQL Connector/J, where autoDeserialize enables unsafe object deserialization. Reachability requires an exposed service, a valid internal account, and a MySQL data source using an internal login password; successful deserialization runs code in the server context.

CVSS severity8.8
High
EPSS probability1.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code execution in Apache DolphinScheduler before 1.3.6 allows remote authenticated users to execute code via MySQL JDBC parameters. The data-source connector passes attacker-controlled connection properties to MySQL Connector/J, where autoDeserialize enables unsafe object deserialization. Reachability requires an exposed service, a valid internal account, and a MySQL data source using an internal login password; successful deserialization runs code in the server context.

The record

CVE
CVE-2021-27644
Published
Nov 1, 2021
Updated
Aug 3, 2024
Vendor
The Apache Software Foundation
Product
Apache DolphinScheduler
Classifications
CWE-89, CWE-264, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 1, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Apache DolphinScheduler <1.3.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache DolphinSchedulerversion=Apache DolphinScheduler <1.3.6

Published CVSS scores

6.0NIST NVDAV:N/AC:M/Au:S/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CWE-264Permissions, Privileges, and Access Controls
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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