CVE-2025-53771 Microsoft SharePoint Server Spoofing Vulnerability
An unauthorized attacker can perform spoofing attacks against Microsoft SharePoint Server due to improper authentication mechanisms.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-53771?
CVE-2025-53771 is a medium-severity authentication bypass vulnerability in Microsoft Sharepoint Server, published on 20 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
Weakness: CWE-287
Which versions are affected by CVE-2025-53771?
It affects 1 product.
Products include Microsoft Sharepoint Server.
How do I fix CVE-2025-53771?
No fix has been published for CVE-2025-53771 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-53771 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-53771 exists.
Public exploit code: 1 Metasploit module and 1 Nuclei template.
Other vulnerabilities in Microsoft Sharepoint Server
- CVE-2026-50522 Microsoft SharePoint Deserialization of Untrusted Data Vulnerability
- CVE-2026-58644 Microsoft SharePoint Deserialization of Untrusted Data
- CVE-2026-20963 Microsoft SharePoint Deserialization of Untrusted Data
- CVE-2025-53770 Microsoft SharePoint Deserialization of Untrusted Data
- CVE-2023-29357 Microsoft SharePoint Server Privilege Escalation
Sources
Also known as GHSA-6pmq-337c-gv96.