---
title: "CVE-2023-51656: Apache IoTDB: Unsafe deserialize map in Sync Tool"
url: https://erroneo.us/security/cve/CVE-2023-51656/
description: "CVE-2023-51656 (org.apache.iotdb:iotdb-parent (Maven)): Deserialization of Untrusted Data vulnerability in Apache IoTDB.This issue affects Apache IoTDB…"
type: vulnerability-record
section: "Security Digest"
date_published: 2023-12-21
date_modified: 2025-02-13
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2023-51656"
kev: false
cvss: 9.8
epss: 0.01035
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2023-51656: Apache IoTDB: Unsafe deserialize map in Sync Tool

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 1.0% , percentile 64: FIRST’s model estimates a 1.0% chance of exploitation activity in the next 30 days, higher than 64% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes org.apache.iotdb:iotdb-parent (Maven) >= 0.13.0, < 1.2.2, fixed in 1.2.2 . Check your lockfile, including transitive dependencies.

## What it is

Deserialization of Untrusted Data vulnerability in Apache IoTDB.This issue affects Apache IoTDB: from 0.13.0 through 0.13.4. Users are recommended to upgrade to version 1.2.2, which fixes the issue.

## Affected packages

- Maven `org.apache.iotdb:iotdb-parent` >= 0.13.0, < 1.2.2 → fixed: 1.2.2

## Affected products (CVE record)

- Apache Software Foundation Apache IoTDB: 0.13.0 <= 0.13.4

## Severity

- GitHub CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- FIRST EPSS (model of 2026-10-21): 1.03% probability of exploitation activity in the next 30 days; percentile 64.

## Sources

- [lists.apache.org](https://lists.apache.org/thread/zy3klwpv11vl5n65josbfo2fyzxg3dxc)
- [GitHub Advisory GHSA-f23h-52hj-99p6](https://github.com/advisories/GHSA-f23h-52hj-99p6)
- [CVE.org record CVE-2023-51656](https://www.cve.org/CVERecord?id=CVE-2023-51656)
- [NVD entry CVE-2023-51656](https://nvd.nist.gov/vuln/detail/CVE-2023-51656)
- [openwall.com](http://www.openwall.com/lists/oss-security/2023/12/21/5)

---
Source page: https://erroneo.us/security/cve/CVE-2023-51656/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt