Cross-site scripting via Function constructor sandbox escape
Published Sep 9, 2024 · Updated Sep 10, 2024
Cross-site scripting in ONLYOFFICE Docs before 8.0.1 allows remote attackers to execute JavaScript through a malicious document macro. The macro sandbox wraps code as an immediately invoked function expression but leaves the Function constructor callable, enabling escape. Exploitation requires a user to open and run the crafted macro, after which code executes in the editor's browser context and can read or alter accessible data.
Summary
What happened
Cross-site scripting in ONLYOFFICE Docs before 8.0.1 allows remote attackers to execute JavaScript through a malicious document macro. The macro sandbox wraps code as an immediately invoked function expression but leaves the Function constructor callable, enabling escape. Exploitation requires a user to open and run the crafted macro, after which code executes in the editor's browser context and can read or alter accessible data.
The record
- CVE
- CVE-2023-50883
- Published
- Sep 9, 2024
- Updated
- Sep 10, 2024
- Vendor
- ONLYOFFICE
- Product
- ONLYOFFICE Docs
- Classifications
- CWE-79, T1204.002, T1059.007
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 9, 2024CVE publishedPublication date reported by the CVE source.
- Sep 10, 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 <8.0.1
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
- SySS macro sandbox-escape demonstrationproof of concept · demonstrated
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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