SB2025101471 - Multiple vulnerabilities in Microsoft SharePoint

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Input validation error (CVE-ID: CVE-2025-59228)

The vulnerability allows a remote attacker to execute arbitrary code on the system.

The vulnerability exists due to insufficient validation of user-supplied input in Microsoft SharePoint. A remote user can pass specially crafted input to the application and execute arbitrary code on the target system.

2) Deserialization of Untrusted Data (CVE-ID: CVE-2025-59237)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data in Microsoft SharePoint. A remote user can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-59228
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-59237