Vulnerability · Published Nov 20, 2025 · Assigned by microsoft
CVE-2025-59245Microsoft SharePoint Online Elevation of Privilege Vulnerability
Critical 9.8
In plain English
A critical-severity unsafe deserialization in Microsoft SharePoint Online from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 67% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)1.1%top 33.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Microsoft SharePoint Online Elevation of Privilege Vulnerability
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft SharePoint Online | - |
Weakness: CWE-502 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
References
- Microsoft SharePoint Online Elevation of Privilege Vulnerability vendor-advisory, patch