Administrator JWT theft via unescaped document names
Published May 31, 2023 · Updated Jan 9, 2025
Stored XSS in Collabora Online before 22.05.13, 21.11.9.1, and 6.4.27 allows remote authenticated users to steal an administrator JWT. The admin history page inserts an attacker-controlled document name as unescaped HTML, causing its script payload to execute in the console origin. Exploitation requires an administrator to open the history page after the crafted document is created; execution can disclose the JWT used by the admin websocket connection.
Summary
What happened
Stored XSS in Collabora Online before 22.05.13, 21.11.9.1, and 6.4.27 allows remote authenticated users to steal an administrator JWT. The admin history page inserts an attacker-controlled document name as unescaped HTML, causing its script payload to execute in the console origin. Exploitation requires an administrator to open the history page after the crafted document is created; execution can disclose the JWT used by the admin websocket connection.
The record
- CVE
- CVE-2023-34088
- Published
- May 31, 2023
- Updated
- Jan 9, 2025
- Vendor
- Collabora Productivity
- Product
- Collabora Online
- Classifications
- CWE-79, T1189
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 31, 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=coolwsd < 21.11.9.1
- Affected versionversion=coolwsd < 22.05.13
- Affected versionversion=loolwsd < 6.4.27
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
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Technologies
Your stack
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Your stack
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