CVE Catalog

CVE-2021-47937

HighCVSS 8.8
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.59%

45th percentile - higher than 45% of all known CVEs

Summary

e107 CMS 2.3.0 allows authenticated users with theme installation permissions to execute arbitrary code by uploading a malicious theme file. Attackers can upload a crafted theme package via the theme.php endpoint that deploys a web shell to the e107_themes directory, then execute system commands via the payload.php script.

Risk Assessment

The organization is at risk of complete server takeover, allowing the attacker to execute arbitrary system commands, leading to loss of confidentiality, integrity, and availability of data.

Recommendation

Immediately update e107 CMS to the latest version and restrict theme installation permissions to trusted administrators only.

Other vulnerabilities in e107 CMS

See all
Original NVD description (English source)

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 data from NVD (NIST) · CISA KEV · EPSS