Reflected XSS Vulnerability in ONLYOFFICE Docs DocumentServer
CVE-2025-5301

6.1MEDIUM

Key Information:

Vendor

Onlyoffice

Status
Docs (documentserver)
Vendor
CVE Published:
12 June 2025

What is CVE-2025-5301?

ONLYOFFICE Docs (DocumentServer), specifically versions equal to or below 8.3.1, are susceptible to a reflected Cross-Site Scripting (XSS) vulnerability. This issue arises when files are accessed through the WOPI protocol, allowing attackers to craft malicious HTTP POST requests. These harmful scripts can be injected and subsequently reflected within the server's HTML response, potentially compromising the safety of users interacting with the web application.

Affected Version(s)

Docs (DocumentServer) <=8.3.1

References

https://r.sec-consult.com/onlyoffice
third-party-advisory
https://github.com/ONLYOFFICE/DocumentServer/blob/master/...
release-notes

EPSS Score

5% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Max Rull, SEC Consult Vulnerability Lab
JSON
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CVE-2025-5301 : Reflected XSS Vulnerability in ONLYOFFICE Docs DocumentServer