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Vulnerabilities

Vulnerability · CVE-2023-38203

Adobe ColdFusion Deserialization of Untrusted Data Vulnerability

Published Jul 17, 2023 · catalog updated Jun 16, 2026 · Adobe ColdFusion

Patch now

CVE-2023-38203 is in the CISA known-exploited catalog, due Jan 29, 2024. Confirm Adobe ColdFusion against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
97.07%
Remediation
Remediation guidance
Affected products
cpe adobe/coldfusion · vendor Adobe ColdFusion

Adobe ColdFusion versions 2018u17 (and earlier), 2021u7 (and earlier) and 2023u1 (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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe adobe/coldfusion2018
  • vendor Adobe ColdFusionversion unspecified

How to fix CVE-2023-38203

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2023-38203 is in the CISA known-exploited catalog, due Jan 29, 2024. Confirm Adobe ColdFusion against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with 2018. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

What should an analyst verify?

CWE-502: Deserialization of Untrusted Data. EPSS 97.07%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 20, 2023 · Catalog

    Detected

    Adobe ColdFusion versions 2018u17 (and earlier), 2021u7 (and earlier) and 2023u1 (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.

  2. Jan 8, 2024 · CISA KEV

    Known exploited

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

  3. Jan 29, 2024 · CISA KEV

    Remediation due

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

  4. Jun 16, 2026 · Catalog

    Updated

    Adobe ColdFusion versions 2018u17 (and earlier), 2021u7 (and earlier) and 2023u1 (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.

Sources

  • CISA KEVConfirmed exploitationCVE-2023-38203

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

    cisa.gov
  • CVE.orgVulnerability recordCVE-2023-38203

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2023-38203

    30-day exploitation probability 97.1%

    first.org
  • NIST NVDVulnerability recordCVE-2023-38203

    Adobe ColdFusion versions 2018u17 (and earlier), 2021u7 (and earlier) and 2023u1 (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.

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2023-38203

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

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.