CVE-2021-47937
e107 CMS 2.3.0 Authenticated Remote Code Execution via Theme Upload
- State
- Published
- Severity
- 8.7 High
- Published
- May 10, 2026
- Updated
- May 12, 2026
- Reserved
- Feb 1, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | 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 | VulnCheck |
| 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-434 Unrestricted Upload of File with Dangerous Type
Affected Products
| Product | Versions |
|---|---|
e107 CMSE107 |
|
References
- ExploitDB-50315exploit
- Official Product Homepageproduct
- Product Referenceproduct
- VulnCheck Advisory: e107 CMS 2.3.0 Authenticated Remote Code Execution via Theme Uploadthird-party-advisory
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