CVE-2020-21359 describes an arbitrary file upload vulnerability in the Template Upload function of Maccms10. This flaw allows unauthenticated attackers to bypass suffix whitelist verification and execute arbitrary code by appending a character to the uploaded file's name. Rated 9.8 Critical (CVSSv3.1), this vulnerability presents a severe risk due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. While no public exploits (Metasploit, Nuclei, ExploitDB) or evidence of active exploitation (KEV) exist, and community discussion is minimal, the potential for remote code execution warrants attention.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
10.0CPE matchmatch criteria | cpe:2.3:a:maccms:maccms:10.0:*:*:*:*:*:*:* |
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.