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CVE-2023-38203

Adobe ColdFusion Deserialization of Untrusted Data

9.8 CRITICALActively exploited (CISA KEV)Used in ransomwareEPSS 97.1%
  1. Published20 Jul 2023
  2. Added to CISA KEV8 Jan 2024
  3. Remediation due29 Jan 2024
Actively exploited (CISA KEV)

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

Added to KEV: 8 Jan 2024Federal remediation due: 29 Jan 2024Used in ransomware

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Adobe Coldfusion2018 · 2021 · 2023

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2023-38203 being actively exploited?

Yes. CVE-2023-38203 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 8 Jan 2024. It has been used in ransomware campaigns.

How severe is CVE-2023-38203?

CVE-2023-38203 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 97.1% probability of exploitation.

Which products are affected by CVE-2023-38203?

Affected products include Adobe Coldfusion.

How do I fix CVE-2023-38203?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-38203 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.