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CVE-2021-47937

e107 CMS 2.3.0 Authenticated Remote Code Execution via Theme Upload

Published: May 10, 2026Updated: May 12, 2026 Sources: CVE List NVDCWE-434
NVD MITRE
8.8CVSSHIGH
EPSS Score
0.6%
Top 56.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

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 Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-434

Affected Products

e107 CMSE107
On-prem
Web & CMS Plugins / cms-core
e107oss-projectWeb & CMS Pluginsaka e107 cms, e107

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

3 techniques
Command and Control
Initial Access
Persistence
View detailed technique mapping

References

https://www.exploit-db.com/exploits/50315
exploit-db.com
https://e107.org/
e107.org
https://e107.org/download
e107.org
and 1 more references View all →

Timeline

Published
May 10, 2026
Last Updated
May 12, 2026

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