CVE-2023-39913Network attack vector

Arbitrary code execution via unrestricted CAS deserialization

Published Nov 8, 2023 · Updated Feb 13, 2025

Unsafe deserialization in Apache UIMA Java SDK before 3.5.0 allows remote authenticated users to execute arbitrary code via crafted CAS data. CasIOUtils, the Vinci service, CAS editor and viewer tools, and CPE checkpointing deserialize Java objects without verifying permitted classes. Remote exposure requires an explicitly started Vinci service or an application that passes untrusted serialized CAS data to CasIOUtils.

CVSS severity8.8
High
EPSS probability1.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe deserialization in Apache UIMA Java SDK before 3.5.0 allows remote authenticated users to execute arbitrary code via crafted CAS data. CasIOUtils, the Vinci service, CAS editor and viewer tools, and CPE checkpointing deserialize Java objects without verifying permitted classes. Remote exposure requires an explicitly started Vinci service or an application that passes untrusted serialized CAS data to CasIOUtils.

The record

CVE
CVE-2023-39913
Published
Nov 8, 2023
Updated
Feb 13, 2025
Vendor
The Apache Software Foundation
Product
Apache UIMA Java SDK Collection Processing Engine (CPE)
Classifications
CWE-502, CWE-20, T1203, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record 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 <3.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache UIMA Java SDK Collection Processing Engine (CPE)version=0 <3.5.0
The Apache Software Foundation · Apache UIMA Java SDK Coreversion=0 <3.5.0
The Apache Software Foundation · Apache UIMA Java SDK Vinci Adapterversion=0 <3.5.0
The Apache Software Foundation · Apache UIMA Java SDK Toolsversion=0 <3.5.0

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8CISA-ADPCVSS: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-502Deserialization of Untrusted Data
CWE-20Improper Input Validation
T1203Exploitation for Client Execution
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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