CVE-2023-51656Network attack vector

Unspecified impact via unsafe Sync Tool deserialization

Published Dec 21, 2023 · Updated Feb 13, 2025

Untrusted deserialization in Apache IoTDB 0.13.0 through 0.13.4 allows remote attackers to trigger unspecified impact via Sync Tool data. The Sync Tool unsafely deserializes an attacker-controlled map, but Apache has not disclosed the responsible class, method, or accepted object types. Network access without authentication or user interaction is the reported gate, while the concrete consequence remains undocumented.

CVSS severity9.8
Critical
EPSS probability1.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Untrusted deserialization in Apache IoTDB 0.13.0 through 0.13.4 allows remote attackers to trigger unspecified impact via Sync Tool data. The Sync Tool unsafely deserializes an attacker-controlled map, but Apache has not disclosed the responsible class, method, or accepted object types. Network access without authentication or user interaction is the reported gate, while the concrete consequence remains undocumented.

The record

CVE
CVE-2023-51656
Published
Dec 21, 2023
Updated
Feb 13, 2025
Vendor
The Apache Software Foundation
Product
Apache IoTDB
Classifications
CWE-502
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 21, 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=0.13.0 <=0.13.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache IoTDBversion=0.13.0 <=0.13.4

Published CVSS scores

9.8NISTCVSS: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

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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