Arbitrary file upload in Nucleuscms Nucleus Cms
CVE-2021-37770
Nucleus CMS v3.71 is affected by a file upload vulnerability. In this vulnerability, we can use upload to change the upload path to the path without the Htaccess file. Upload an Htaccess file and write it to AddType application / x-httpd-php.jpg. In this way, an attacker can upload a picture with shell, treat it as PHP, execute commands, so as to take down website resources.
Vulnerability class: Unrestricted File Upload
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.013 (70.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 70.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: +0.000
Affected products
- Nucleuscms Nucleus Cms — versions 3.71
Weakness classification (CWE)
References
- github.com/NucleusCMS/NucleusCMS/issues/96 (Exploit, Third Party Advisory, Issue Tracking)
- shimo.im/docs/Ch9CphJt8XwTvQ3d (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-37770?
- CVE-2021-37770 is a high-severity vulnerability in Nucleuscms Nucleus Cms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.2/10. Published 2022-06-30.
- How severe is CVE-2021-37770?
- High severity. CVSS v3 base score is 7.2 out of 10.