HIGH
CVE-2021-28976
CVSS v3
7.2
HIGH
EPSS Score
7.5 %
exploit probability, as of 2026-10-05
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
Remote Code Execution vulnerability in GetSimpleCMS before 3.3.16 in admin/upload.php via phar filess.
Technical details
- Published
- 2021-06-23
- Exploit-DB
- EDB-52168
Frequently asked questions
What is CVE-2021-28976?
Remote Code Execution vulnerability in GetSimpleCMS before 3.3.16 in admin/upload.php via phar filess.
Is CVE-2021-28976 actively exploited?
Active exploitation of CVE-2021-28976 has not been confirmed. Its EPSS score was 7.5% on 2026-10-05, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-28976?
CVE-2021-28976 has a CVSS v3 base score of 7.2 (HIGH severity).
Is CVE-2021-28976 affecting your environment?
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