Administrator escalation via stored SVG token theft
Published Sep 2, 2024 · Updated Sep 3, 2024
Stored XSS in Jellyfin 10.8.0 through 10.9.9 allows remote authenticated users to gain administrator access via a crafted SVG profile image. The user profile image upload accepts script-bearing SVG content, and direct browser rendering lets that script read an administrator's LocalStorage access token and invoke the user-policy API. Exploitation requires an administrator to open the image outside the Web UI; the stolen token grants the attacker's account administrator privileges.
Summary
What happened
Stored XSS in Jellyfin 10.8.0 through 10.9.9 allows remote authenticated users to gain administrator access via a crafted SVG profile image. The user profile image upload accepts script-bearing SVG content, and direct browser rendering lets that script read an administrator's LocalStorage access token and invoke the user-policy API. Exploitation requires an administrator to open the image outside the Web UI; the stolen token grants the attacker's account administrator privileges.
The record
- CVE
- CVE-2024-43801
- Published
- Sep 2, 2024
- Updated
- Sep 3, 2024
- Vendor
- Jellyfin
- Product
- Jellyfin
- Classifications
- CWE-200, T1528
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 2, 2024CVE publishedPublication date reported by the CVE source.
- Sep 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=>= 10.8.0, < 10.9.10
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
- Happy Little Accidents Jellyfin XSS payloadfunctional · demonstrated
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Technologies
Your stack
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Your stack
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