Stored script execution via incorrect MIME inspection
Published Aug 19, 2023 · Updated Oct 2, 2024
Stored XSS in Cockpit CMS before 2.6.4 allows remote authenticated users to execute script in another user's browser through an asset upload. The Assets upload handler calls finfo_file on a destination path derived from the submitted filename rather than on the actual temporary upload, so forbidden HTML MIME content can pass validation and be stored. A user with asset-upload permission must submit the file, and execution occurs when another user opens the stored asset, allowing same-origin access to data and actions available to that user.
Summary
What happened
Stored XSS in Cockpit CMS before 2.6.4 allows remote authenticated users to execute script in another user's browser through an asset upload. The Assets upload handler calls finfo_file on a destination path derived from the submitted filename rather than on the actual temporary upload, so forbidden HTML MIME content can pass validation and be stored. A user with asset-upload permission must submit the file, and execution occurs when another user opens the stored asset, allowing same-origin access to data and actions available to that user.
The record
- CVE
- CVE-2023-4433
- Published
- Aug 19, 2023
- Updated
- Oct 2, 2024
- Vendor
- Cockpit HQ
- Product
- Cockpit CMS
- Classifications
- CWE-79, T1059.007
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 19, 2023CVE publishedPublication date reported by the CVE source.
- Oct 2, 2024Record 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=0 <2.6.4
- Affected versionversion=unspecified <2.6.4
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
- huntr asset-upload proof of conceptproof of concept · unverified
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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