CVE-2025-5301

6.1 mediumEPSS 62%

Medium (6.1). EPSS 62% chance of exploitation in the next 30 days.

ONLYOFFICE Docs (DocumentServer) in versions equal and below 8.3.1 are affected by a reflected cross-site scripting (XSS) issue when opening files via the WOPI protocol. Attackers could inject malicious scripts via crafted HTTP POST requests, which are then reflected in the server's HTML response.

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: 62% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2025-06-12
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

References

https://github.com/ONLYOFFICE/DocumentServer/blob/master/CHANGELOG.md#832
https://r.sec-consult.com/onlyoffice
http://seclists.org/fulldisclosure/2025/Jun/18
https://sec-consult.com/vulnerability-lab/advisory/reflected-cross-site-scripting-in-onlyoffice-docs-documentserver/

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