Stored XSS via unsafe asset upload
Published Aug 18, 2023 · Updated Oct 3, 2024
Stored cross-site scripting in Cockpit CMS before 2.6.3 allows remote authenticated users to execute script in another user's browser via uploaded content. The asset-upload handler previously trusted filename extensions and did not validate MIME types, allowing HTML files to be stored and rendered as active content. Exploitation requires an authenticated user who can upload an asset and a victim to open the rendered asset or affected page; the impact is browser-session data exposure or actions performed in the victim's context.
Summary
What happened
Stored cross-site scripting in Cockpit CMS before 2.6.3 allows remote authenticated users to execute script in another user's browser via uploaded content. The asset-upload handler previously trusted filename extensions and did not validate MIME types, allowing HTML files to be stored and rendered as active content. Exploitation requires an authenticated user who can upload an asset and a victim to open the rendered asset or affected page; the impact is browser-session data exposure or actions performed in the victim's context.
The record
- CVE
- CVE-2023-4422
- Published
- Aug 18, 2023
- Updated
- Oct 3, 2024
- Vendor
- Cockpit HQ
- Product
- Cockpit CMS
- Classifications
- CWE-79, T1189
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 18, 2023CVE publishedPublication date reported by the CVE source.
- Oct 3, 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 <2.6.3
- Affected versionversion=unspecified <2.6.3
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.
Weakness, pattern, technique
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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