CVE-2023-40571Network attack vector

Remote code execution via unchecked response deserialization

Published Aug 25, 2023 · Updated Oct 2, 2024

Deserialization of untrusted data in weblogic-framework 0.2.3 and earlier allows remote attackers to execute code via a malicious server response. The command-echo handler directly deserializes returned packets without verification while its class loader exposes multiple deserialization calls. Exploitation requires the tool to scan an attacker-controlled or compromised WebLogic endpoint, and code runs with the tool process's privileges.

CVSS severity9.8
Critical
EPSS probability1.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization of untrusted data in weblogic-framework 0.2.3 and earlier allows remote attackers to execute code via a malicious server response. The command-echo handler directly deserializes returned packets without verification while its class loader exposes multiple deserialization calls. Exploitation requires the tool to scan an attacker-controlled or compromised WebLogic endpoint, and code runs with the tool process's privileges.

The record

CVE
CVE-2023-40571
Published
Aug 25, 2023
Updated
Oct 2, 2024
Vendor
Oracle
Product
Oracle WebLogic Server
Classifications
CWE-502, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 2, 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=< 0.2.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle · Oracle WebLogic Serverversion=< 0.2.4

Published CVSS scores

9.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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