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How the CVE Works
CVE-2025-49706 is an improper authentication flaw in Microsoft SharePoint that allows an unauthorized attacker to perform spoofing attacks over a network. The vulnerability arises due to insufficient validation of authentication tokens, enabling an attacker to impersonate a legitimate user. By crafting malicious requests, the attacker can bypass authentication mechanisms and gain unauthorized access to sensitive SharePoint resources. This can lead to data manipulation, unauthorized information disclosure, or further exploitation within the network.
DailyCVE Form
Platform: Microsoft SharePoint
Version: 2016, 2019, Subscription (<16.0.18526.20424)
Vulnerability: Improper Authentication
Severity: Critical
Date: 2025-07-22
Prediction: Patch expected by 2025-08-15
What Undercode Say
Get-SPSite | Select Url Lists SharePoint sites Test-SPOAuthToken -Token $maliciousToken Checks token validity
curl -X POST -H "Auth: FAKE_TOKEN" $SHAREPOINT_URL/api
How Exploit
- Spoof authentication tokens.
- Send crafted requests to SharePoint API.
- Bypass login mechanisms.
Protection from this CVE
- Apply Microsoft’s security patch.
- Disable legacy SharePoint versions.
- Enforce strict token validation.
Impact
- Unauthorized data access.
- Privilege escalation.
- Network compromise.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
