Arbitrary file upload in Get-Simple Getsimplecms

CVE-2021-28976

Remote Code Execution vulnerability in GetSimpleCMS before 3.3.16 in admin/upload.php via phar filess.

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: 0.075 (94.3th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2021-28976: held from 0.075 to 0.075.

EPSS over last 30 days · oldest: 0.075 · newest: 0.075 · change: 0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2021-28976?
CVE-2021-28976 is a high-severity vulnerability in Get-Simple Getsimplecms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.2/10. Published 2021-06-23.
How severe is CVE-2021-28976?
High severity. CVSS v3 base score is 7.2 out of 10.