Mark of the Web bypass via crafted HTML
Published Nov 7, 2025 · Updated Nov 7, 2025
Security feature bypass in Google Chrome before 140.0.7339.80 on Windows allows remote attackers to evade Mark of the Web via crafted HTML. Google identifies the Downloads component but has not publicly disclosed which origin-validation operation mishandles the page or downloaded file. The attack requires user interaction with attacker-controlled web content; the documented consequence is loss of the Windows provenance mark rather than direct code execution.
Summary
What happened
Security feature bypass in Google Chrome before 140.0.7339.80 on Windows allows remote attackers to evade Mark of the Web via crafted HTML. Google identifies the Downloads component but has not publicly disclosed which origin-validation operation mishandles the page or downloaded file. The attack requires user interaction with attacker-controlled web content; the documented consequence is loss of the Windows provenance mark rather than direct code execution.
The record
- CVE
- CVE-2025-12905
- Published
- Nov 7, 2025
- Updated
- Nov 7, 2025
- Vendor
- Google Cloud
- Product
- Google Chrome
- Classifications
- CWE-346, T1204
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 7, 2025CVE publishedPublication date reported by the CVE source.
- Nov 7, 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.
- Affected versionversion=140.0.7339.80 <140.0.7339.80
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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