Sensitive information disclosure via unvalidated resource URI
Published Apr 11, 2023 · Updated Feb 28, 2025
SSRF in affected Microsoft SharePoint Server releases allows remote authenticated users to read sensitive resources via crafted URIs. The WSSXmlUrlResolver class accesses a supplied URI without properly validating its destination before retrieving the resource. Exploitation requires a valid SharePoint account and exposes information reachable under the IUSR security context, with no reported service interruption.
Summary
What happened
SSRF in affected Microsoft SharePoint Server releases allows remote authenticated users to read sensitive resources via crafted URIs. The WSSXmlUrlResolver class accesses a supplied URI without properly validating its destination before retrieving the resource. Exploitation requires a valid SharePoint account and exposes information reachable under the IUSR security context, with no reported service interruption.
The record
- CVE
- CVE-2023-28288
- Published
- Apr 11, 2023
- Updated
- Feb 28, 2025
- Vendor
- Microsoft
- Product
- Microsoft SharePoint Foundation 2013
- Classifications
- CWE-918
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 11, 2023CVE publishedPublication date reported by the CVE source.
- Feb 28, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=15.0.0 <15.0.5545.1000
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Microsoft SharePoint Enterprise Server 2016 - Spoofingproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo