CVE-2023-50883

6.1 mediumEPSS 0.6%

Medium (6.1) in onlyoffice document server. EPSS 0.6% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

6.1 medium

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

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 49% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2024-09-09
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

onlyoffice:document_server

References

https://www.onlyoffice.com/
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2023-027.txt
https://www.syss.de/pentest-blog/cross-site-scripting-schwachstelle-in-onlyoffice-docs-syss-2023-027

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