Is CVE-2021-47937 actively exploited?

No active exploitation of CVE-2021-47937 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-47937 be exploited remotely?

Yes. CVE-2021-47937 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-47937?

CVE-2021-47937 has a CVSS score of 8.8 (HIGH).

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HIGH

CVE-2021-47937

CWE-434Published: May 10, 2026· Updated: May 12, 2026

8.8

CVSS v3.1

EPSS:0.27%probability of exploitation in 30 daysPercentile:49.9th

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.

NVD Source

Technical Analysis

CVE-2021-47937 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.