Vulnerability · Published May 10, 2026 · Assigned by VulnCheck

CVE-2021-47937e107 CMS 2.3.0 Authenticated Remote Code Execution via Theme Upload

High 8.8

In plain English

A high-severity unrestricted file upload in e107 CMS from E107. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.6%top 51.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
E107	e107 CMS	2.3.0

Weakness: CWE-434 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

ExploitDB-50315 exploit
Official Product Homepage product
Product Reference product
VulnCheck Advisory: e107 CMS 2.3.0 Authenticated Remote Code Execution via Theme Upload third-party-advisory