CVE-2023-50883

Name: CVE-2023-50883
Creator: NVD / NIST
Published: 2024-09-09T20:15:03.64+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.57%

Last modified Jun 17, 2026

CVE-2023-50883 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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.. EPSS estimates a 0.57% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.57%

43.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Onlyoffice	Document Server	< 8.0.1

References

https://www.onlyoffice.com/Product
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2023-027.txtExploit, Third Party Advisory
https://www.syss.de/pentest-blog/cross-site-scripting-schwachstelle-in-onlyoffice-docs-syss-2023-027Third Party Advisory

Timeline

Published: Sep 9, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-50883?

How severe is CVE-2023-50883?

CVE-2023-50883 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.57% probability of exploitation in the next 30 days.

How do I fix CVE-2023-50883?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-50883?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST