Threat+Constellation
Live— UTC
← Incidents
INCIDENT 863Exploited vulnerabilityHIGH CONFIDENCESourced

CVE-2021-3199 added to CISA KEV: ONLYOFFICE Docs Server Path Traversal Vulnerability

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. Product: ONLYOFFICE Docs. 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 re…

Last evidence update
08 OCT 2026 · 00:00 UTC
Source count
2
Status
high confidence
CVE-2021-3199
Observation history

How this record has evolved as evidence accumulated.

09 OCT · 05:00 UTC
Initial report
10 OCT · 05:00 UTC
Second independent source
10 OCT · 05:00 UTC
Confidence upgraded
10 OCT · 05:00 UTC
Status changed
Evidence
Related incidents