CVE-2021-47937

HIGH

e107 CMS 2.3.0 Authenticated Remote Code Execution via Theme Upload

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-47937. PoCs published by Halit AKAYDIN.

AI-analyzed exploit summary This exploit demonstrates an authenticated RCE vulnerability in e107 CMS 2.3.0 by uploading a malicious ZIP file containing a PHP payload via the theme upload functionality, then executing arbitrary commands through the uploaded payload.

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.

Exploits (1)

exploitdb WORKING POC
by Halit AKAYDIN · pythonwebappsphp
https://www.exploit-db.com/exploits/50315

This exploit demonstrates an authenticated RCE vulnerability in e107 CMS 2.3.0 by uploading a malicious ZIP file containing a PHP payload via the theme upload functionality, then executing arbitrary commands through the uploaded payload.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: e107 CMS 2.3.0
Auth required
Prerequisites: valid admin credentials · theme upload permissions
devstral-2 · analyzed May 10, 2026 Full analysis →

References (4)

Core 4
Core References
Exploit exploit
ExploitDB-50315
https://www.exploit-db.com/exploits/50315
Product product
Official Product Homepage
https://e107.org/
Product product
Product Reference
https://e107.org/download
Third Party Advisory third-party-advisory
VulnCheck Advisory: e107 CMS 2.3.0 Authenticated Remote Code Execution via Theme Upload
https://www.vulncheck.com/advisories/e107-cms-authenticated-remote-code-execution-via-theme-upload

Scores

CVSS v3 8.8
EPSS 0.0059
EPSS Percentile 43.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-434
Status published
Products (1)
E107/e107 CMS 2.3.0
Published May 10, 2026
Tracked Since May 10, 2026