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Vulnerability record · CVE-2021-47937 · published 10 May 2026

CVE-2021-47937: Unrestricted file upload vulnerability

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.

8.7 CVSS 4.0 High EPSS 0.59% · top 54.0% CWE-434 · Unrestricted file upload Deferred
8.7CVSS 4.0 base score
0.59%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
25 Jul 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

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

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Source: NIST National Vulnerability Database (record CVE-2021-47937), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.