CVE-2025-8881Network attack vector

Cross-origin data disclosure via File Picker

Published Aug 13, 2025 · Updated Aug 13, 2025

Origin validation error in Google Chrome before 139.0.7258.127 allows remote attackers to leak cross-origin data through a crafted HTML page. The public record identifies the File Picker as the affected locus but does not disclose which origin check or file-selection operation is implemented incorrectly. Exploitation requires an unauthenticated remote attacker to convince a user to perform specific interface gestures, and the reported consequence is disclosure of cross-origin data.

CVSS severity6.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Origin validation error in Google Chrome before 139.0.7258.127 allows remote attackers to leak cross-origin data through a crafted HTML page. The public record identifies the File Picker as the affected locus but does not disclose which origin check or file-selection operation is implemented incorrectly. Exploitation requires an unauthenticated remote attacker to convince a user to perform specific interface gestures, and the reported consequence is disclosure of cross-origin data.

The record

CVE
CVE-2025-8881
Published
Aug 13, 2025
Updated
Aug 13, 2025
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-303, CWE-346, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 13, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 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=139.0.7258.127 <139.0.7258.127

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=139.0.7258.127 <139.0.7258.127

Published CVSS scores

6.5CISA ADPCVSS: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-303Incorrect Implementation of Authentication Algorithm
CWE-346Origin Validation Error
T1189Drive-by Compromise

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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