CRITICALCVSS 9.8Vulnerability
CVE-2021-3199
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.
Properties
- severity
- CRITICAL
- product
- Docs
- vulnerabilityName
- ONLYOFFICE Docs Server Path Traversal Vulnerability
- cvss_severity
- CRITICAL
- cvss_score
- 9.8
- dueDate
- 2026-10-11
- retrieved_at
- 2026-10-08T19:23:31+00:00
- requiredAction
- 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 discon
- dateAdded
- 2026-10-08
- score
- 9.8
- last_source
- NVD
- cve_id
- CVE-2021-3199
- cvss_vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- signal_observed_at
- 2026-10-08T19:23:25+00:00
- vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- vendorProject
- ONLYOFFICE
- published_at
- 2021-01-26T18:16:28.507
- last_modified
- 2026-10-08T18:17:12.203
Related Entities (4)
HAS_WEAKNESS (1)
→[Weakness]Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
DESCRIBED_BY (1)
→[Source]NVD
AFFECTS_PRODUCT (1)
→[Product]
KNOWN_EXPLOITED (1)
→[Source]CISA KEV
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