CVE-2023-21742
HighExploitedMicrosoft SharePoint Server Remote Code Execution Vulnerability
Published Jan 11, 2023 · Updated Feb 28, 2025 · Also known as TR-23-0015
Key Facts
Patch immediately- CVE-2023-21742 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Sharepoint Foundation (Microsoft), Sharepoint Server (Microsoft), Microsoft SharePoint Enterprise Server 2013 Service Pack 1 and 4 more products.
- It is exploited in the wild, listed in Industry KEV feed since Dec 20, 2023. No public exploit code is known.
- EPSS estimates a 56% probability of exploitation in the next 30 days.
- Fixed versions are available, including Microsoft SharePoint Enterprise Server 2013 Service Pack 1 15.0.5519.1000, Microsoft SharePoint Enterprise Server 2016 16.0.5378.1000, Microsoft SharePoint Foundation 2013 Service Pack 1 15.0.5519.1000.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
56%
Higher than 99.0% of all scored CVEs
Exploited in the wild
Yes
1 catalog listing
Public exploit code
None known
Get the full CVE-2023-21742 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Microsoft SharePoint Server Remote Code Execution Vulnerability
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Dec 20, 2023 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
10 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Sharepoint FoundationMicrosoft | 2013-sp1 | n/a |
| Sharepoint ServerMicrosoft | 2013-sp1, 2016, 2019 | n/a |
| Microsoft SharePoint Enterprise Server 2013 Service Pack 1 | >= 15.0.0 | 15.0.5519.1000 |
| Microsoft SharePoint Enterprise Server 2016 | >= 16.0.0 | 16.0.5378.1000 |
| Microsoft SharePoint Foundation 2013 Service Pack 1 | >= 15.0.0 | 15.0.5519.1000 |
Patched Releases
Microsoft SharePoint Enterprise Server 2013 Service Pack 1
15.0.5519.1000
Microsoft SharePoint Enterprise Server 2016
16.0.5378.1000
Microsoft SharePoint Foundation 2013 Service Pack 1
15.0.5519.1000
Microsoft SharePoint Server 2019
16.0.10394.20021
Microsoft SharePoint Server Subscription Edition
16.0.15601.20418
Timeline
Publicly disclosed
Jan 11, 2023
Added to Industry KEV feed
Dec 20, 2023
Last updated
Feb 28, 2025
Weakness Type
- CWE-284 Improper Access Control
References
- advisoryhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21742
- advisoryhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21743
- advisoryhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21744
- advisoryhttps://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-21742
- advisoryhttps://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-21743
FAQ
Common Questions.
Microsoft SharePoint Server Remote Code Execution Vulnerability
Affected: Sharepoint Foundation (Microsoft) versions 2013-sp1; Sharepoint Server (Microsoft) versions 2013-sp1, 2016, 2019; Microsoft SharePoint Enterprise Server 2013 Service Pack 1 versions >= 15.0.0, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Dec 20, 2023.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Microsoft SharePoint Enterprise Server 2013 Service Pack 1 15.0.5519.1000, Microsoft SharePoint Enterprise Server 2016 16.0.5378.1000, Microsoft SharePoint Foundation 2013 Service Pack 1 15.0.5519.1000.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2023-21742 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo