Adobe · ColdFusion

CVE-2023-29300

Adobe ColdFusion Deserialization of Untrusted Data Arbitrary code execution

Exploited in attacks Used by ransomware Critical 9.8 Attack chance: >99.9%

What it is

Adobe ColdFusion versions 2018u16 (and earlier), 2021u6 (and earlier) and 2023.0.0.330468 (and earlier) are affected by a Deserialization of Untrusted Data vulnerability that could result in Arbitrary code execution. Exploitation of this issue does not require user interaction.

CISA: Adobe ColdFusion contains a deserialization of untrusted data vulnerability that allows for code execution.

What to do

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Deadline for US federal agencies: January 29, 2024

helpx.adobe.com/security/products/coldfusion/apsb23-40.html

Added to the CISA list: January 8, 2024
Published: July 12, 2023
Severity: Critical 9.8 CVSS 3.1
Chance of attacks in the next 30 days (EPSS): >99.9% in the top 0.1% of all known vulnerabilities
Weakness: CWE-502
More details: NVD · CVE.org · CISA

More exploited flaws from Adobe

Added	Vulnerability	Product	Severity	Attack chance
Jul 7, 2026	Path TraversalCVE-2026-48282	ColdFusion	Critical 10.0	42%
Feb 24, 2025	DeserializationCVE-2017-3066	ColdFusion	Critical 9.8	91%
Dec 16, 2024	Improper Access ControlCVE-2024-20767	ColdFusion	High 7.4	99%
Jan 8, 2024	Deserialization of Untrusted DataCVE-2023-38203used by ransomware	ColdFusion	Critical 9.8	97%
Aug 21, 2023	Deserialization of Untrusted DataCVE-2023-26359	ColdFusion	Critical 9.8	17%
Jul 20, 2023	Improper Access ControlCVE-2023-29298	ColdFusion	High 7.5	99.8%
Jul 20, 2023	Improper Access ControlCVE-2023-38205	ColdFusion	High 7.5	99.8%
Mar 15, 2023	Deserialization of Untrusted DataCVE-2023-26360	ColdFusion	High 8.6	97%

All of them →

Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.