CVE-2023-24881Network attack vector

Sensitive data disclosure via overly broad origin trust

Published Jul 11, 2023 · Updated Jul 10, 2025

Information disclosure in Microsoft Teams.js 2.0.0 through 2.10.0 allows remote attackers to read sensitive data after user interaction. The SDK trusts message origins admitted through validDomains or app.initialize() validMessageOrigins, including attacker-controlled wildcard subdomains. A target must interact with an affected Teams app whose configuration permits an origin outside the developer's control; Microsoft has not identified the exposed data.

CVSS severity6.5
Medium
EPSS probability1.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Microsoft Teams.js 2.0.0 through 2.10.0 allows remote attackers to read sensitive data after user interaction. The SDK trusts message origins admitted through validDomains or app.initialize() validMessageOrigins, including attacker-controlled wildcard subdomains. A target must interact with an affected Teams app whose configuration permits an origin outside the developer's control; Microsoft has not identified the exposed data.

The record

CVE
CVE-2023-24881
Published
Jul 11, 2023
Updated
Jul 10, 2025
Vendor
Microsoft
Product
Microsoft Teams
Classifications
CWE-200
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 11, 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=2.0.0 <2.10.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft Teamsversion=2.0.0 <2.10.1

Published CVSS scores

6.5GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/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-200Exposure of Sensitive Information to an Unauthorized Actor

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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