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CVE-2023-24955

Microsoft SharePoint Server Remote Code Execution Vulnerability

HIGH
7.2
CVSS Score
Published: May 9, 2023 at 05:03 PM UTC
Updated: June 17, 2026 at 05:40 AM UTC
5 products affected across 1 vendorSharePoint ServerSharePoint Enterprise ServerSharePoint Server 2019

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Severity
HIGH7.2
Exploitation
CISA KEV
Exploit prediction
EPSS 85%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score85.0%

EPSS (Exploit Prediction Scoring System) estimates a 85.0% chance this CVE is exploited in the wild within the next 30 days — higher than 100% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

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

Required Action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Ransomware Use
Known
Added to KEV
Mar 26, 2024
Remediation Due
Apr 16, 2024
923 days overdue
Notes
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-24955
https://nvd.nist.gov/vuln/detail/CVE-2023-24955

Description

Microsoft SharePoint Server Remote Code Execution Vulnerability

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

SharePoint Enterprise Server· Microsoft
95%
2016
SharePoint Server· Microsoft
95%
16.0.0 ≤ v < 16.0.10398.2000016.0.0 ≤ v < 16.0.16130.2042016.0.0 ≤ v < 16.0.5395.10002019
Affected range stops below 16.0.10398.20000, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.0.16130.20420, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.0.5395.1000, so it looks safe — our inference, not a vendor statement
SharePoint Enterprise Server 2016· Microsoft
60%
16.0.0 ≤ v < 16.0.5395.100016.0.0
Affected range stops below 16.0.5395.1000, so it looks safe — our inference, not a vendor statement
SharePoint Server 2019· Microsoft
60%
16.0.0 ≤ v < 16.0.10398.2000016.0.0
Affected range stops below 16.0.10398.20000, so it looks safe — our inference, not a vendor statement
SharePoint Server Subscription Edition· Microsoft
60%
16.0.0 ≤ v < 16.0.16130.2042016.0.0
Affected range stops below 16.0.16130.20420, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor AdvisoryPatch
Source: [email protected]
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-24955
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-24955

SSVC — Action Prioritization

SSVCActiveNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.2HIGHmicrosoft
Vector?

Quick Info

StatusANALYZED
CWE
CWE-94

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