CVE-2023-44351Network attack vector

Unauthenticated code execution via unfiltered WDDX deserialization

Published Nov 17, 2023 · Updated Sep 4, 2024

Untrusted-data deserialization in Adobe ColdFusion 2023 Update 5 and earlier and 2021 Update 11 and earlier allows remote attackers to execute code. The WDDX path fails to validate ColdFusion packages and classes through cfserialfilter before deserialization, permitting unsafe object reconstruction. No authentication or user interaction is required, and successful exploitation grants code execution with the server process's privileges.

CVSS severity9.8
Critical
EPSS probability50.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Untrusted-data deserialization in Adobe ColdFusion 2023 Update 5 and earlier and 2021 Update 11 and earlier allows remote attackers to execute code. The WDDX path fails to validate ColdFusion packages and classes through cfserialfilter before deserialization, permitting unsafe object reconstruction. No authentication or user interaction is required, and successful exploitation grants code execution with the server process's privileges.

The record

CVE
CVE-2023-44351
Published
Nov 17, 2023
Updated
Sep 4, 2024
Vendor
Adobe
Product
ColdFusion
Classifications
CWE-502, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 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 <=2021.11
  2. Affected versionversion=0 <=2023.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Adobe · ColdFusionversion=0 <=2021.11; version=0 <=2023.5

Published CVSS scores

9.8AdobeCVSS: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
T1190Exploit Public-Facing Application

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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