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Unscored
ONLYOFFICE Docs Server Path Traversal Vulnerability
CVE-2021-3199 Exploited
ONLYOFFICE Docs contains a path traversal vulnerability that can occur when JWT is used, via a /.. sequence in an image upload parameter and could allow for remote code execution.
Being exploited in the wild
Catalogued 8 October 2026 · US federal remediation deadline 11 October 2026
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…
Assessment
- CVSS
- Not yet scored
- Severity
- Unscored
- Known exploited
- Yes — listed in the CISA KEV catalog
- Exploit availability
- CISA KEV
- Published
- 8 October 2026
- Last updated
- 8 October 2026
- Affected
- ONLYOFFICE · Docs
- Weakness
- CWE-22
At the source
References
Query this programmatically
Agents can read this through the MCP endpoint, or over HTTP:
curl https://www.cve.zerocrew.in/api/cve/CVE-2021-3199