CVE-2023-50883: document server XSS — Exploit

Description

ONLYOFFICE Docs before 8.0.1 allows XSS because a macro is an immediately-invoked function expression (IIFE), and therefore a sandbox escape is possible by directly calling the constructor of the Function object. NOTE: this issue exists because of an incorrect fix for CVE-2021-43446.

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CVSS v3.1 Score

6.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
onlyoffice	document_server	< 8.0.1

References

Exploits

https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2023-027.txt

Other References

https://www.onlyoffice.com/ https://www.syss.de/pentest-blog/cross-site-scripting-schwachstelle-in-onlyoffice-docs-syss-2023-027

Frequently Asked Questions

What is CVE-2023-50883? +

ONLYOFFICE Docs before 8.0.1 allows XSS because a macro is an immediately-invoked function expression (IIFE), and therefore a sandbox escape is possible by directly calling the constructor of the Function object. NOTE: this issue exists because of an incorrect fix for CVE-2021-43446. It has a CVSS v3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2023-50883? +

CVE-2023-50883 has a CVSS v3.1 score of 6.1 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2023-50883? +

CVE-2023-50883 affects products from onlyoffice, specifically: document_server. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-50883? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2023-50883