Arbitrary file upload in Opencats
CVE-2021-41560
OpenCATS through 0.9.6 allows remote attackers to execute arbitrary code by uploading an executable file via lib/FileUtility.php.
Vulnerability class: Unrestricted File Upload
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.113 (95.9th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 95.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.111 · newest: 0.113 · change: +0.002
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- youtu.be/isiDISag7CM (Third Party Advisory, Broken Link)
- github.com/opencats/OpenCATS/commit/b1af3bde1f68bec1c703ad66a3e390f15ed8ebe1 (Patch, Third Party Advisory)
- github.com/Nickguitar/RevCAT (Exploit, Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-41560?
- CVE-2021-41560 is a critical-severity vulnerability in Opencats, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2021-12-15.
- How severe is CVE-2021-41560?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-41560 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.