Reflected Cross-Site Scripting in ONLYOFFICE Docs (DocumentServer)
Priority MEDIUM 62CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.62356 99th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| ONLYOFFICE | Docs (DocumentServer) | up to 8.3.1 | — | No fix listed | CNA |
- Docs (DocumentServer) VendorONLYOFFICE Affected up to 8.3.1 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-5301
- 2026-10-03 Alias added: GHSA-r5fg-8fjv-3w9h
References
More ONLYOFFICE vulnerabilities
- TI-2021-02273 Path traversal in ONLYOFFICE Document Server enables code execution KEVCVSS 3.1CRITICAL 9.8
- TI-2023-17445 Onlyoffice Community Server before v12.5.2 was discovered to contain a remote code… CVSS 3.1CRITICAL 9.8
- TI-2023-14162 An out of bounds memory access vulnerability in ONLYOFFICE DocumentServer 4.0.3 through… CVSS 3.1CRITICAL 9.8
- TI-2023-14161 A use after free issue discovered in ONLYOFFICE DocumentServer 4.0.3 through 7.3.2 allows… CVSS 3.1CRITICAL 9.8
- TI-2023-14163 Memory Exhaustion vulnerability in ONLYOFFICE Document Server 4.0.3 through 7.3.2 allows… CVSS 3.1HIGH 7.5
- TI-2021-19374 ONLYOFFICE all versions as of 2021-11-08 is affected by Incorrect Access Control. CVSS 3.1HIGH 7.5
Sources
- CVE-2025-5301 · CVE Program
- CVE-2025-5301 · NVD
- FIRST EPSS
- GHSA-r5fg-8fjv-3w9h · GitHub Advisory Database · CC BY 4.0
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