CVE-2021-28976 json
Remote Code Execution vulnerability in GetSimpleCMS before 3.3.16 in admin/upload.php via phar filess.
published 2021-06-23 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-15623
- cvss
- 7.2
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 7.5%
- EPSS 7.5% chance of exploitation in 30 days, percentile 94%
- public exploits
- 1
- Exploit-DB
Summary
Remote Code Execution vulnerability in GetSimpleCMS before 3.3.16 in admin/upload.php via phar filess.
Patch / fix
- get-simple getsimplecms 3.3.15
Timeline
- Published
- First public exploit (EDB-52168)
Exploit prediction
7.55% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-52168 GetSimpleCMS 3.3.16 - Remote Code Execution (RCE) webapps, 2025-04-11
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.5 | AV:N/AC:L/Au:S/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
-
github.com
/GetSimpleCMS/GetSimpleCMS/issues/1335
third-party-advisory
Sources
- CVE List CVE-2021-28976
- NVD CVE-2021-28976
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