CVE-2021-47937CWE-434

e107 CMS 2.3.0 Authenticated Remote Code Execution via Theme Upload

High · published May 10, 2026

CVSS v4.0
8.7
EPSS
1%
Percentile
47.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00590 · 47.5th percentile
Weakness
CWE-434 · Unrestricted Upload of File with Dangerous Type
Published
2026-05-10T12:43Z
EPSS history
Timeline
  • 10 MAY 12:43Z
    e107 CMS 2.3.0 Authenticated Remote Code Execution via Theme Upload
    cvelistv5