High severity · published May 10, 2026
CVE-2021-47937
e107 CMS 2.3.0 Authenticated Remote Code Execution via Theme Upload
8.8
CVSS
0.6%
EPSS
No
On KEV
Description
e107 CMS 2.3.0 contains a remote code execution vulnerability that allows authenticated users with theme installation permissions to execute arbitrary commands by uploading malicious theme files. Attackers can upload a crafted theme package through the theme.php endpoint that deploys a web shell to the e107_themes directory, then execute system commands via the payload.php script.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EC
e107 CMS · E107
2.3.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-47937
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-47937
e107.org
https://e107.org/
e107.org
https://e107.org/download
www.exploit-db.com
https://www.exploit-db.com/exploits/50315
www.vulncheck.com
https://www.vulncheck.com/advisories/e107-cms-authenticated-remote-code-execution-via-theme-upload
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