CVE-2021-28976 is a Remote Code Execution (RCE) vulnerability affecting GetSimpleCMS versions prior to 3.3.16, specifically within the admin/upload.php component through the use of PHAR files. This high-severity vulnerability, rated 7.2 CVSSv3.1, allows an authenticated attacker with high privileges to execute arbitrary code remotely with low attack complexity, leading to complete compromise of confidentiality, integrity, and availability. While not listed in CISA's KEV catalog, an exploit module is publicly available on ExploitDB (EDB-52168), indicating the potential for exploitation. Despite this, there is currently no evidence of active exploitation, Metasploit or Nuclei modules, or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 3.3.15CPE matchmatch criteria | cpe:2.3:a:get-simple:getsimplecms:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.3 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.