CVE-2023-24955

Microsoft SharePoint Server: Code Injection

As of , CVE-2023-24955 in Microsoft SharePoint Server is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.

Exploited
Yes: CISA listed it on 26 March 2024
US federal deadline
16 April 202421 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
Known
EPSS score
0.85Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
EPSS when listed
0.31 on 26 March 2024EPSS on the day CISA listed it.
Public exploit
1 Metasploit module
Fix
Vendor advice: msrc.microsoft.comLinks below, from CISA's entry.

What CISA says to do

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

CISA's required action

What the flaw is

Microsoft SharePoint Server contains a code injection vulnerability that allows an authenticated attacker with Site Owner privileges to execute code remotely.

CISA's description

Microsoft SharePoint Server Remote Code Execution Vulnerability

The CVE record's description, from microsoft

CVE published
9 May 2023
Assigned by
microsoft
CVSS
7.2 High (CVSS 3.1, from the CNA)
CWE-94
Improper Control of Generation of Code ('Code Injection')
CISA SSVC, exploitation
active
CISA SSVC, automatable
no
CISA SSVC, technical impact
total

Timeline

  1. The CVE record was published.
  2. CISA added it to its list of exploited vulnerabilities.
  3. The US federal deadline to fix it.

Public exploits

Facts from Metasploit's module list and Exploit-DB's index; we never copy exploit code.

  • Metasploit: Sharepoint Dynamic Proxy Generator Unauth RCEexploit module, rank excellent

SharePoint Server: other exploited entries

VulnerabilityProductOur groupListedDeadlineEPSS
CVE-2026-45659Deserialization of Untrusted DataMicrosoft SharePoint ServerPatch nowForensic triage required by CISA; ransomware use, listed within a year0.03
CVE-2026-56164Missing Authentication for Critical FunctionMicrosoft SharePoint ServerPatch nowForensic triage required by CISA0.01
CVE-2023-29357Privilege EscalationMicrosoft SharePoint ServerPatch this weekRansomware use; Metasploit module; EPSS 0.990.99
CVE-2026-32201Improper Input ValidationMicrosoft SharePoint ServerPatch soon0.43

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