Auth bypass in Onlyoffice Server
CVE-2021-43445
ONLYOFFICE all versions as of 2021-11-08 is affected by Incorrect Access Control. An attacker can authenticate with the web socket service of the ONLYOFFICE document editor which is protected by JWT auth by using a default JWT signing key.
Vulnerability class: Broken Authentication
EPSS: 0.017 (75.0th 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 Server
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Third Party Advisory)
- cve@mitre.org (Product, Vendor Advisory)
- cve@mitre.org (Third Party Advisory, Mitigation)
Frequently asked questions
- What is CVE-2021-43445?
- CVE-2021-43445 is a critical-severity vulnerability in Onlyoffice Server, classified under Improper Authentication. CVSS score: 9.8/10. Published 2023-01-23.
- How severe is CVE-2021-43445?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-43445 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.