CVE-2021-3199
ONLYOFFICE Docs Server Path Traversal Vulnerability
IN CISA KEV
Directory traversal with remote code execution can occur in /upload in ONLYOFFICE Document Server before 5.6.3, when JWT is used, via a /.. sequence in an image upload parameter.
- Vendor
- ONLYOFFICE
- Product
- Docs
- CVSS 3.1
- 9.8 (critical), scored by NVD (primary)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 3.1
- 9.8 (critical), scored by 134c704f-9b21-4f2e-91b3-4a467353bcc0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CWE
- CWE-22
- Published
- 2021-01-26
- NVD modified
- 2026-10-09
- NVD status
- Analyzed
CISA KEV
- Date added
- 2026-10-08
- Due date
- 2026-10-11
- Ransomware use
- Unknown
- Required action
- Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
References
- github.com (Release Notes, Third Party Advisory)
- github.com (Release Notes, Third Party Advisory)
- www.cisa.gov (US Government Resource)
Data last updated 15 Oct 2026. Sources: NVD API 2.0, CISA KEV catalog. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.