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CVE-2025-5301— Reflected Cross-Site Scripting in ONLYOFFICE Docs (DocumentServer)

Quick assessment

Affected
OnlyOffice Docs (DocumentServer)
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ONLYOFFICE Docs是ONLYOFFICE公司的一款在线办公软件。 ONLYOFFICE Docs 8.3.1及之前版本存在安全漏洞，该漏洞源于通过WOPI协议打开文件时存在反射型跨站脚本，可能导致执行恶意脚本。

AI Predicted 4.7 Difficulty: Easy EPSS 62.36% · P99

Public Exploits 1

Nuclei · 1 CVE-2025-5301.yaml [template]
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I. Basic Information for CVE-2025-5301

Vulnerability Information
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Vulnerability Title
Reflected Cross-Site Scripting in ONLYOFFICE Docs (DocumentServer)
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
ONLYOFFICE Docs 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ONLYOFFICE Docs是ONLYOFFICE公司的一款在线办公软件。 ONLYOFFICE Docs 8.3.1及之前版本存在安全漏洞，该漏洞源于通过WOPI协议打开文件时存在反射型跨站脚本，可能导致执行恶意脚本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OnlyOffice Docs (DocumentServer) <=8.3.1 -

II. Public POCs for CVE-2025-5301

# POC Description Source Link Shenlong Link
1 ONLYOFFICE Docs (DocumentServer) <= 8.3.1 contains a reflected XSS caused by improper sanitization of crafted HTTP POST requests via the WOPI protocol, letting attackers inject malicious scripts reflected in HTML response, exploit requires crafted POST requests. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-5301.yaml POC Details
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III. Intelligence Information for CVE-2025-5301

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Other References for CVE-2025-5301 (1)

IV. Related Vulnerabilities

Same vendor: OnlyOffice
Same weakness: CWE-79

V. Comments for CVE-2025-5301

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