CVE-2021-30201 is a high-severity XML External Entity (XXE) vulnerability affecting Kaseya VSA. It allows an unauthenticated attacker to read arbitrary files on the server and potentially pivot into the local network by sending specially crafted XML to the /vsaWS/KaseyaWS.asmx API endpoint. The vulnerability has a CVSS score of 7.5 (HIGH) due to its network attack vector, low complexity, and high impact on confidentiality. While no public exploit code or Metasploit modules are available, the vulnerability has garnered significant community discussion and media coverage, including reports of its use in REvil ransomware attacks, indicating active exploitation.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 9.5.6CPE matchmatch criteria | cpe:2.3:a:kaseya:vsa:*:*:*:*:-:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.