CVE-2023-33132Network attack vector

Authenticated browser script execution

Published Jun 13, 2023 · Updated Feb 28, 2025

Cross-site scripting in Microsoft SharePoint Server allows remote authenticated users to execute script in another user's browser. Microsoft identifies improper neutralization of web-page input but has not disclosed the affected request, field, or rendering operation. Exploitation requires low privileges and user interaction and can disclose browser-accessible data or alter rendered content, without interrupting the service.

CVSS severity6.3
Medium
EPSS probability0.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Microsoft SharePoint Server allows remote authenticated users to execute script in another user's browser. Microsoft identifies improper neutralization of web-page input but has not disclosed the affected request, field, or rendering operation. Exploitation requires low privileges and user interaction and can disclose browser-accessible data or alter rendered content, without interrupting the service.

The record

CVE
CVE-2023-33132
Published
Jun 13, 2023
Updated
Feb 28, 2025
Vendor
Microsoft
Product
Microsoft SharePoint Server 2019
Classifications
CWE-79
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 13, 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

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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 <16.0.10399.20005

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Microsoft · Microsoft SharePoint Server 2019version=16.0.0 <16.0.10399.20005
Microsoft · Microsoft SharePoint Server Subscription Editionversion=16.0.0 <16.0.16130.20548

Published CVSS scores

6.3Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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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