CVE-2023-23395Network attack vector

User redirection via undisclosed open-redirect mechanism

Published Mar 14, 2023 · Updated Feb 28, 2025

Open redirect in affected Microsoft SharePoint Server releases allows remote attackers to redirect users through a crafted URL. Microsoft identifies CWE-601 but has not disclosed the affected component, request parameter, or validation error that accepts an untrusted destination. Exploitation is unauthenticated over the network but requires user interaction and can change only the destination followed by the user's browser.

CVSS severity3.1
Low
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Open redirect in affected Microsoft SharePoint Server releases allows remote attackers to redirect users through a crafted URL. Microsoft identifies CWE-601 but has not disclosed the affected component, request parameter, or validation error that accepts an untrusted destination. Exploitation is unauthenticated over the network but requires user interaction and can change only the destination followed by the user's browser.

The record

CVE
CVE-2023-23395
Published
Mar 14, 2023
Updated
Feb 28, 2025
Vendor
Microsoft
Product
Microsoft SharePoint Foundation 2013
Classifications
CWE-601, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 14, 2023CVE publishedPublication date reported by the CVE source.
  2. 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.

  1. Affected versionversion=15.0.0 <15.0.5537.1000

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft SharePoint Foundation 2013version=15.0.0 <15.0.5537.1000
Microsoft · Microsoft SharePoint Enterprise Server 2016version=16.0.0 <16.0.5387.1000
Microsoft · Microsoft SharePoint Enterprise Server 2013version=15.0.0 <15.0.5537.1000
Microsoft · Microsoft SharePoint Server 2019version=16.0.0 <16.0.10396.20000
Microsoft · Microsoft SharePoint Server Subscription Editionversion=16.0.0 <16.0.16130.20166

Published CVSS scores

3.1Microsoft CorporationCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
T1204.001User Execution: Malicious Link

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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