SSRF in Onlyoffice Server
CVE-2021-43449
ONLYOFFICE all versions as of 2021-11-08 is vulnerable to Server-Side Request Forgery (SSRF). The document editor service can be abused to read and serve arbitrary URLs as a document.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.012 (68.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/ONLYOFFICE/server (Third Party Advisory)
- www.onlyoffice.com/ (Product, Vendor Advisory)
- labs.nettitude.com/blog/exploiting-onlyoffice-web-sockets-for-unauthenticated-r… (Exploit, Third Party Advisory, Mitigation)
Frequently asked questions
- What is CVE-2021-43449?
- CVE-2021-43449 is a high-severity vulnerability in Onlyoffice Server, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.1/10. Published 2023-01-23.
- How severe is CVE-2021-43449?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2021-43449 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.