CVE-2021-47937

HIGH 8.8

e107 CMS 2.3.0 Authenticated Remote Code Execution via Theme Upload

CVSS Score

8.8

EPSS Score

0.3%

EPSS Percentile

50th

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.

CWE	CWE-434
Vendor	e107
Product	e107 cms
Published	May 10, 2026
Last Updated	May 12, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

E107 / e107 CMS

2.3.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/50315 e107.org: https://e107.org/ e107.org: https://e107.org/download vulncheck.com: https://www.vulncheck.com/advisories/e107-cms-authenticated-remote-code-execution-via-theme-upload

Credits

Halit AKAYDIN (hLtAkydn)