CVE-2023-24955
Microsoft SharePoint Server Code Injection Vulnerability
Microsoft SharePoint Server
Microsoft SharePoint Server Remote Code Execution Vulnerability
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 26 March 2024. US federal agencies were required to remediate it by 16 April 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 85%, which is higher than 99.7% 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:H/UI:N/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2023-24955 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2023-24955.
What does CVE-2023-24955 affect?
CVE-2023-24955 affects Microsoft SharePoint Server. Microsoft SharePoint Server Remote Code Execution Vulnerability
How severe is CVE-2023-24955?
CVE-2023-24955 is rated HIGH with a CVSS base score of 7.2. EPSS puts the probability of exploitation in the next 30 days at 85%, higher than 99.7% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 16 April 2024.
How should organisations respond to CVE-2023-24955?
Apply the vendor patch for Microsoft SharePoint Server 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.