Arbitrary file upload in Std42 Elfinder
CVE-2021-23394
The package studio-42/elfinder before 2.1.58 are vulnerable to Remote Code Execution (RCE) via execution of PHP code in a .phar file. NOTE: This only applies if the server parses .phar files as PHP.
Vulnerability class: Unrestricted File Upload
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.189 (97.2th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.191 · newest: 0.189 · change: -0.001
Affected products
- Std42 Elfinder
- Studio-42/elfinder — versions unspecified
Weakness classification (CWE)
Public proof-of-concept exploits
References
- snyk.io/vuln/SNYK-PHP-STUDIO42ELFINDER-1290554 (Third Party Advisory)
- github.com/Studio-42/elFinder (Third Party Advisory)
- github.com/Studio-42/elFinder/issues/3295 (Exploit, Patch, Third Party Advisory, Issue Tracking)
- github.com/Studio-42/elFinder/commit/75ea92decc16a5daf7f618f85dc621d1b534b5e1 (Patch, Third Party Advisory)
- blog.sonarsource.com/elfinder-case-study-of-web-file-manager-vulnerabilities/ (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-23394?
- CVE-2021-23394 is a high-severity vulnerability in Std42 Elfinder, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.1/10. Published 2021-06-13.
- How severe is CVE-2021-23394?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2021-23394 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.