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NVD / CVE Program· CNA microsoft

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

Noroxi assessment

Priority: Now (action score 83/100)

  • CISA has confirmed exploitation in the wild (Mar 26, 2024); it is known to be used in ransomware campaigns. Remediation deadline for US federal agencies: Apr 16, 2024.
  • A ready-made attack module is public (Metasploit); exploiting it takes no special expertise.
  • Probability of exploitation in the next 30 days: 84.9% (FIRST EPSS); higher than 99.7% of all records.
  • Anyone who can reach it over the internet can trigger it. Administrator privileges are required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Microsoft SharePoint Enterprise Server 2016 16.0.5395.1000; Microsoft SharePoint Server 2019 16.0.10398.20000; Microsoft SharePoint Server Subscription Edition 16.0.16130.20420.

Patch today or shut off access. Upgrade to Microsoft SharePoint Enterprise Server 2016 16.0.5395.1000; Microsoft SharePoint Server 2019 16.0.10398.20000; Microsoft SharePoint Server Subscription Edition 16.0.16130.20420 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

HighCVSS 7.2 · v3.1KEVWeaponized Fix available
Published
May 9, 2023
Updated
Jun 17, 2026
EPSS
84.9% · 99th percentile

Report tools

JSON

Action score

83

Now

Patch today or shut off access.

CVSS
28 / 40 · 7.2 / 10
CISA KEV
30 / 30 · Listed
EPSS
25 / 30 · 84.9%

CISA SSVC decision

Exploitation
active
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · microsoft
7.2
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Mar 26, 2024. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Apr 16, 2024.

Known to be used in ransomware campaigns.

Get told when this record changes

  • In CISA KEV: exploitation in the wild confirmed
  • Weaponized exploit exists
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2023-24955

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
microsoftsharepoint enterprise server
microsoftsharepoint server

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • microsoft sharepoint enterprise server2016
  • microsoft sharepoint serverall versions
  • microsoft sharepoint server2019

Versions reported by the vendor

Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.

  • Microsoft Microsoft SharePoint Enterprise Server 2016

    • 16.0.0 and later · before 16.0.5395.1000affected

  • Microsoft Microsoft SharePoint Server 2019

    • 16.0.0 and later · before 16.0.10398.20000affected

  • Microsoft Microsoft SharePoint Server Subscription Edition

    • 16.0.0 and later · before 16.0.16130.20420affected

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-0604A remote code execution vulnerability exists in Microsoft SharePoint when the software fails to check the source markup of an application paKEV
    99Now
  • CVE-2025-49706Microsoft SharePoint Server Spoofing VulnerabilityKEV
    86Now
  • CVE-2020-16952Microsoft SharePoint Remote Code Execution Vulnerability
    60This week

Published before and after this one in the same product

  • ← EarlierCVE-2023-21717Feb 14, 2023 · Microsoft SharePoint Server Elevation of Privilege Vulnerability
    35Monitor
  • ← EarlierCVE-2023-24950May 9, 2023 · Microsoft SharePoint Server Spoofing Vulnerability
    46Plan
  • Later →CVE-2023-38177Nov 14, 2023 · Microsoft SharePoint Server Remote Code Execution Vulnerability
    28Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Microsoft SharePoint Enterprise Server 201616.0.5395.1000 · KB5002397Microsoft (MSRC)
Microsoft SharePoint Server 201916.0.10398.20000 · KB5002389Microsoft (MSRC)
Microsoft SharePoint Server Subscription Edition16.0.16130.20420 · KB5002390Microsoft (MSRC)

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Metasploit module ×1
  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Metasploit moduleexploit/windows/http/sharepoint_dynamic_proxy_generator_auth_bypass_rceSharepoint Dynamic Proxy Generator Unauth RCEexploit2023-05-01
Proof-of-concept repository on GitHubstars:132023-12-28

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Metasploit-9 d
  2. Published
  3. First PoC+232 d
  4. CISA KEV+321 d
  5. TodayNov 1, 2026+1272 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-94 · Improper Control of Generation of Code ('Code Injection')

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records