CVE-2021-21973 is a Server-Side Request Forgery (SSRF) vulnerability in the vSphere Client (HTML5) affecting VMware vCenter Server and Cloud Foundation versions. This flaw, stemming from improper URL validation in a vCenter Server plugin, allows an unauthenticated attacker with network access to port 443 to send a POST request, leading to information disclosure. Rated as Medium severity (CVSS 5.3), its low attack complexity and network-based vector make it a significant risk, as reflected by its high EPSS and FAUCET Risk Scores. This vulnerability is actively exploited in the wild and has garnered substantial community discussion and media coverage, with Nuclei templates available for detection.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 3.0, < 3.10.1.2CPE matchmatch criteria | cpe:2.3:a:vmware:cloud_foundation:*:*:*:*:*:*:*:* | ||
>= 4.0, < 4.2CPE matchmatch criteria | cpe:2.3:a:vmware:cloud_foundation:*:*:*:*:*:*:*:* | ||
6.5CPE matchmatch criteria | cpe:2.3:a:vmware:vcenter_server:6.5:-:*:*:*:*:*:* | ||
6.5CPE matchmatch criteria | cpe:2.3:a:vmware:vcenter_server:6.5:a:*:*:*:*:*:* | ||
6.5CPE matchmatch criteria | cpe:2.3:a:vmware:vcenter_server:6.5:b:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
VMware ESXi and vSphere Client Vulnerabilities (VMSA-2021-0002)
Jan 1, 2021Per VMware security advisory VMSA-2021-0002, VMware received reports of multiple vulnerabilities in VMware ESXi and vSphere Client (HTML5).
VMware ESXi and vSphere Client Multiple Vulnerabilities