CVE-2025-5301: XSS (CVSS 6.1)

Description

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.

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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)

References

Other 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/

Frequently Asked Questions

What is CVE-2025-5301? +

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. It has a CVSS v3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2025-5301? +

CVE-2025-5301 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.

How do I check if I'm vulnerable to CVE-2025-5301? +

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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