Arbitrary file upload in E107 Cms
CVE-2021-47937
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.
Vulnerability class: Unrestricted File Upload
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (46.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- E107 Cms — versions 2.3.0
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/50315 (exploit)
- e107.org/ (product)
- e107.org/download (product)
- www.vulncheck.com/advisories/e107-cms-authenticated-remote-code-execution-via-t… (third-party-advisory)
Frequently asked questions
- What is CVE-2021-47937?
- CVE-2021-47937 is a high-severity vulnerability in E107 Cms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2026-05-10.
- How severe is CVE-2021-47937?
- High severity. CVSS v3 base score is 8.8 out of 10.