Path Traversal in Onlyoffice Document_server
CVE-2021-25833
A file extension handling issue was found in [server] module of ONLYOFFICE DocumentServer v4.2.0.71-v5.6.0.21. The file extension is controlled by an attacker through the request data and leads to arbitrary file overwriting. Using this vul…
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.435 (98.6th percentile) — read the EPSS interpretation.
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.
Affected products
- Onlyoffice Document_server
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Product, x_refsource_MISC, Vendor Advisory)
- cve@mitre.org (Product, x_refsource_MISC)
- cve@mitre.org (Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-25833?
- CVE-2021-25833 is a critical-severity vulnerability in Onlyoffice Document_server, classified under Path Traversal. CVSS score: 9.8/10. Published 2021-03-01.
- How severe is CVE-2021-25833?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-25833 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.