CVE-2023-24955 | Microsoft SharePoint Server Remote Code Execution Vulnerability

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Microsoft SharePoint Server Remote Code Execution Vulnerability

Published: 2023-05-09 Last update: 2025-10-28 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-24955 is rated Critical Active Threat (88.9/100): CVSS High severity, with high exploitation likelihood (EPSS 91.79%, 100th percentile). CISA KEV confirms active exploitation (added 2024-03-26) affecting Microsoft / SharePoint Server. a weakness (CWE-94) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2023-24955

Name: Microsoft SharePoint Server Code Injection Vulnerability · CISA KEV detail

Exploit added: 2024-03-26

Action due: 2024-04-16

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

Exploit prediction scoring system (EPSS) score for CVE-2023-24955

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-10 91.62% 91.79% +0.17%
2 2026-05-06 91.68% 91.62% -0.05%
3 2026-04-23 — 91.68% —

Full EPSS history (84 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-24955

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.2 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.2 5.9 [email protected]

Weakness enumeration for CVE-2023-24955

Affected software / configurations for CVE-2023-24955

Vendor Product Version Raw CPE
microsoft sharepoint_enterprise_server 2016 cpe:2.3:a:microsoft:sharepoint_enterprise_server:2016:*:*:*:*:*:*:*
microsoft sharepoint_server — cpe:2.3:a:microsoft:sharepoint_server:-:*:*:*:subscription:*:*:*
microsoft sharepoint_server 2019 cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*

References for CVE-2023-24955

cvelogic Threat Intelligence