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CRITICAL · CVSS 9.8 CISA Known Exploited Vulnerability

CVE-2023-29300

Adobe ColdFusion Deserialization of Untrusted Data Vulnerability

Adobe ColdFusion

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.

CVSS
9.8
CRITICAL
EPSS
100%
30-day exploitation
Ransomware groups
0
recorded exploiting
Published
12 Jul 2023
CWE-502

Exploitation status

CISA Known Exploited Vulnerabilities

Listed by CISA on 8 January 2024. US federal agencies were required to remediate it by 29 January 2024. CISA records this vulnerability as known to be used in ransomware campaigns.

EPSS — exploitation probability

FIRST puts the probability of exploitation activity in the next 30 days at 100%, which is higher than 99.9% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Frequently asked questions

Is CVE-2023-29300 being exploited by ransomware groups?

No ransomware group in this database is currently recorded as exploiting CVE-2023-29300.

What does CVE-2023-29300 affect?

CVE-2023-29300 affects Adobe ColdFusion. 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 severe is CVE-2023-29300?

CVE-2023-29300 is rated CRITICAL with a CVSS base score of 9.8. EPSS puts the probability of exploitation in the next 30 days at 100%, higher than 99.9% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 29 January 2024.

How should organisations respond to CVE-2023-29300?

Apply the vendor patch for Adobe ColdFusion as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.