# KB5002390: May 2023 security update

KB5002390, released May 9, 2023, fixes 3 CVEs in Microsoft SharePoint Server Subscription Edition. One of them is being exploited (CVE-2023-24955); 1 on CISA KEV. Patch Radar priority: Patch now.

- Web page: https://patchblox.com/security/fix/microsoft/kb5002390
- Platform: Microsoft
- Released: May 9, 2023
- Priority: Patch now (Closes CVE-2023-24955, exploited (CISA KEV, ransomware))
- CVEs: 3, exploited: 1, on CISA KEV: 1
- Vendor advisory: https://support.microsoft.com/help/5002390

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Microsoft SharePoint Server Subscription Edition](https://patchblox.com/security/data/product/microsoft/microsoft-sharepoint-server-subscription-edition.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2023-24955](https://patchblox.com/security/data/cve/CVE-2023-24955.md) | Patch now | Microsoft Office SharePoint | 7.2 | 0.8497 | CISA KEV, Ransomware |
| [CVE-2023-24950](https://patchblox.com/security/data/cve/CVE-2023-24950.md) | Urgent | Microsoft Office SharePoint | 6.5 | 0.6745 | More likely |
| [CVE-2023-24954](https://patchblox.com/security/data/cve/CVE-2023-24954.md) | Urgent | Microsoft Office SharePoint | 6.5 | 0.0179 | More likely |

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Data as of 2026-11-07T06:34:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo