Cross-origin image-size disclosure via drag data
Published Jun 2, 2023 · Updated Jan 9, 2025
Information disclosure in Mozilla Firefox 109 allows remote attackers to learn a cross-origin image's size through drag and drop. A dragged image is exposed through DataTransfer as file data, so the drop target can read its size despite the same-origin boundary. Exploitation requires a user to drag and drop the image; the reported consequence is limited to disclosure of its size.
Summary
What happened
Information disclosure in Mozilla Firefox 109 allows remote attackers to learn a cross-origin image's size through drag and drop. A dragged image is exposed through DataTransfer as file data, so the drop target can read its size despite the same-origin boundary. Exploitation requires a user to drag and drop the image; the reported consequence is limited to disclosure of its size.
The record
- CVE
- CVE-2023-25741
- Published
- Jun 2, 2023
- Updated
- Jan 9, 2025
- Vendor
- Mozilla
- Product
- Firefox
- Classifications
- CWE-203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 2, 2023CVE publishedPublication date reported by the CVE source.
- Jan 9, 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=unspecified <110
What conditions does exploitation require?
What is affected?
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.
Weakness, pattern, technique
Public exploit references
- Image drag-and-drop size-leak proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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