CVE-2023-24954Network attack vector

Authenticated information disclosure via userphoto endpoint SSRF

Published May 9, 2023 · Updated Jul 10, 2025

SSRF in Microsoft SharePoint Server 2016, 2019, and Subscription Edition lets remote authenticated users disclose user tokens and Domain SID data. The userphoto endpoint exposes information in the SharePoint server context, but public advisories do not identify the attacker-controlled request field or failed destination check. Network access and a SharePoint account are required; the documented result is disclosure of user tokens and the targeted site's Domain SID prefix, without integrity or availability impact.

CVSS severity6.5
Medium
EPSS probability1.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Microsoft SharePoint Server 2016, 2019, and Subscription Edition lets remote authenticated users disclose user tokens and Domain SID data. The userphoto endpoint exposes information in the SharePoint server context, but public advisories do not identify the attacker-controlled request field or failed destination check. Network access and a SharePoint account are required; the documented result is disclosure of user tokens and the targeted site's Domain SID prefix, without integrity or availability impact.

The record

CVE
CVE-2023-24954
Published
May 9, 2023
Updated
Jul 10, 2025
Vendor
Microsoft
Product
Microsoft SharePoint Enterprise Server 2016
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 9, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=16.0.0 <16.0.5395.1000

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Microsoft · Microsoft SharePoint Enterprise Server 2016version=16.0.0 <16.0.5395.1000
Microsoft · Microsoft SharePoint Server 2019version=16.0.0 <16.0.10398.20000
Microsoft · Microsoft SharePoint Server Subscription Editionversion=16.0.0 <16.0.16130.20420

Published CVSS scores

6.5Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
5.7Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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