Reflected Cross-Site Scripting in ONLYOFFICE Docs (DocumentServer)

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.

Scores

EPSS (exploitation in 30 days)

62.4% · top 0.8% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: poc · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.1.

Weakness

• CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') (opens in a new tab)All about CWE-79 and its CVEs

Affected products

• OnlyOffice · Docs (DocumentServer)

  • affected <=8.3.1

What to do

Solution: The vendor provides a patched version v8.3.2 (or higher) which can be downloaded from: https://github.com/ONLYOFFICE/DocumentServer/

References (4)

• https://r.sec-consult.com/onlyoffice (opens in a new tab)third-party-advisory
• https://github.com/ONLYOFFICE/DocumentServer/blob/master/CHANGELOG.md#832 (opens in a new tab)release-notes
• https://sec-consult.com/vulnerability-lab/advisory/reflected-cross-site-scripting-in-onlyoffice-docs-documentserver/ (opens in a new tab)exploit
• http://seclists.org/fulldisclosure/2025/Jun/18 (opens in a new tab)

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2025-5301](https://trackcve.app/badge/CVE-2025-5301.svg)](https://trackcve.app/cve/CVE-2025-5301)

Record last updated 18 Jun 2025, 04:08 UTC.