Path Traversal in Onlyoffice Document Server
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.082 (94.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.082 · newest: 0.082 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/ONLYOFFICE/DocumentServer/blob/903fe5ab7a275bd69c3c3346af2d21cf87ebe… (Third Party Advisory, Release Notes)
- github.com/nola-milkin/poc_exploits/blob/master/CVE-2021-3199/poc_uploadImageFi… (Exploit, Third Party Advisory)
- github.com/moehw/poc_exploits/tree/master/CVE-2021-3199/poc_uploadImageFile.py (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-3199?
- CVE-2021-3199 is a critical-severity vulnerability in Onlyoffice Document Server, classified under Path Traversal. CVSS score: 9.8/10. Published 2021-01-26.
- How severe is CVE-2021-3199?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-3199 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.