CVE-2023-29300
CRITICALCISA KEVEPSS 100th pctlDescription
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.
How to fix
Actively exploited, no published fix found yet
CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Federal remediation due: 2024-01-29
Known ransomware campaign use
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
Very high risk: more likely to be exploited than 100% of all known CVEs.
Adobe ColdFusion Deserialization of Untrusted Data Vulnerability
Adobe ColdFusion contains a deserialization of untrusted data vulnerability that allows for code execution.
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Remediation due: 2024-01-29
Associated with ransomware campaigns
References
Related Vulnerabilities
Other CWE-502 (Deserialization of Untrusted Data) vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2023-0669 | High | 7.2 | 100% | KEV + Ransom | Fix |
| CVE-2021-44228 | Critical | 10.0 | 100% | KEV + Ransom | Fix |
| CVE-2021-35464 | Critical | 9.8 | 100% | KEV + Ransom | Fix |
| CVE-2025-53770 | Critical | 9.8 | 100% | KEV + Ransom | Fix |
| CVE-2022-41082 | High | 8.0 | 100% | KEV + Ransom | Fix |
| CVE-2022-47986 | Critical | 9.8 | 100% | KEV + Ransom | - |
Common questions
How do I fix CVE-2023-29300?
No published fix for CVE-2023-29300 has been found yet. It is on the CISA Known Exploited Vulnerabilities list; federal agencies must remediate by 2024-01-29. Apply the vendor's mitigations per CISA's guidance.
Is CVE-2023-29300 being actively exploited?
Yes. CVE-2023-29300 is listed in the CISA Known Exploited Vulnerabilities catalog, which means exploitation has been observed in the wild. CISA has also linked it to known ransomware campaigns. US federal agencies were required to remediate it by 2024-01-29. Treat it as a priority whatever its CVSS score says.
How severe is CVE-2023-29300?
CVE-2023-29300 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-23.