CSRF in Filebrowser
CVE-2021-46398
A Cross-Site Request Forgery vulnerability exists in Filebrowser < 2.18.0 that allows attackers to create a backdoor user with admin privilege and get access to the filesystem via a malicious HTML webpage that is sent to the victim. An admin can run commands using the FileBrowser and hence it leads to RCE.
Vulnerability class: CSRF (Cross-Site Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.067 (93.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.067 · newest: 0.067 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/filebrowser/filebrowser/commit/74b7cd8e81840537a8206317344f118093153… (Patch, Third Party Advisory)
- febin0x4e4a.blogspot.com/2022/01/critical-csrf-in-filebrowser.html (Exploit, Third Party Advisory)
- febin0x4e4a.wordpress.com/2022/01/19/critical-csrf-in-filebrowser/ (Exploit, Third Party Advisory)
- systemweakness.com/critical-csrf-to-rce-in-filebrowser-865a3c34b8e7 (Exploit, Third Party Advisory)
- packetstormsecurity.com/files/165885/FileBrowser-2.17.2-Code-Execution-Cross-Si… (Exploit, VDB Entry, Third Party Advisory)
- febinj.medium.com/critical-csrf-to-rce-in-filebrowser-865a3c34b8e7 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-46398?
- CVE-2021-46398 is a high-severity vulnerability in Filebrowser, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2022-02-04.
- How severe is CVE-2021-46398?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-46398 known to be exploited?
- 16 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.