CVE-2021-20617 is a critical improper access control vulnerability affecting acmailer versions 4.0.1 and earlier, and acmailer DB versions 1.1.3 and earlier. This flaw allows unauthenticated remote attackers to execute arbitrary OS commands or gain administrative privileges, potentially leading to the compromise of sensitive server information. With a CVSS score of 9.8 (CRITICAL) and an EPSS score indicating high exploitability, this vulnerability poses a significant risk due to its low attack complexity and severe impact on confidentiality, integrity, and availability. While not listed on CISA's KEV catalog and lacking Metasploit or ExploitDB entries, Nuclei templates exist for detecting and exploiting this vulnerability, suggesting potential for active exploitation despite minimal community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 4.0.1CPE matchmatch criteria | cpe:2.3:a:acmailer:acmailer:*:*:*:*:*:*:*:* | ||
<= 1.1.3CPE matchmatch criteria | cpe:2.3:a:acmailer:acmailer_db:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.