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CVE-2021-32682: elFinder 2.1.58 - Remote Code Execution

TitleelFinder 2.1.58 - Remote Code Execution
Authorsmaranchand
SeverityCritical
ImpactSuccessful exploitation of this vulnerability could allow an attacker to execute arbitrary code on the affected system.
RemediationUpdate to elFinder 2.1.59 or later. As a workaround, ensure the connector is not exposed without authentication.
CVSS Score9.8
EPSS Score0.93466
CVE IDCVE-2021-32682
CWE IDCWE-22
Tags cve2021 cve elfinder misconfig rce oss std42 vuln

🔍 Vulnerability Description

elFinder 2.1.58 is impacted by multiple remote code execution vulnerabilities that could allow an attacker to execute arbitrary code and commands on the server hosting the elFinder PHP connector, even with minimal configuration.

🌐 HTTP Request

GET /admin/elfinder/elfinder-cke.html HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_4) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.1 Safari/605.1.15
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
GET /assets/backend/elfinder/elfinder-cke.html HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.5 Mobile/15E148 Safari/604.1
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
GET /assets/elFinder-2.1.9/elfinder.html HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:1.9.5.20) Gecko/ Firefox/13.0
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
GET /assets/elFinder/elfinder.html HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 Version/16.3 Safari/605.1.15
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
GET /backend/elfinder/elfinder-cke.html HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:124.0) Gecko/20100101 Firefox/124.0
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
GET /elfinder/elfinder-cke.html HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:131.0) Gecko/20100101 Firefox/131.0
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
GET /uploads/assets/backend/elfinder/elfinder-cke.html HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
GET /uploads/assets/backend/elfinder/elfinder.html HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:125.0) Gecko/20100101 Firefox/125.0
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
GET /uploads/elfinder/elfinder-cke.html HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.79 Safari/537.36 Edge/14.14393
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip

📚 References


🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2021/CVE-2021-32682.yaml

🦈 Packet Capture: ⬇️ Download cve-2021-32682.pcap

⚠️ Notice: These rules are for detection purposes. Please tune them before applying to a production environment.
Snort 2 Rule
N/A
Snort 3 Rule
N/A