# CVE-2023-21743: Microsoft SharePoint Server Security Feature Bypass Vulnerability

CVE-2023-21743 is fixed in 3 products on 1 platform, first by KB5002338, released January 10, 2023. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2023-21743
- Priority: Urgent
- CVSS: 5.3 (Critical)
- EPSS: 0.0116
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation More Likely
- Published: Jan 10, 2023
- Weakness: Missing Authentication for Critical Function
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21743

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft SharePoint Enterprise Server 2016 |  | [KB5002338](https://patchblox.com/security/data/fix/microsoft/kb5002338.md) | Jan 10, 2023 |
| Microsoft | Microsoft SharePoint Server 2019 |  | [KB5002329](https://patchblox.com/security/data/fix/microsoft/kb5002329.md) | Jan 10, 2023 |
| Microsoft | Microsoft SharePoint Server Subscription Edition |  | [KB5002331](https://patchblox.com/security/data/fix/microsoft/kb5002331.md) | Jan 10, 2023 |

---

Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.