XSS in VMware Esxi

CVE-2020-3955

ESXi 6.5 without patch ESXi650-201912104-SG and ESXi 6.7 without patch ESXi670-202004103-SG do not properly neutralize script-related HTML when viewing virtual machines attributes. VMware has evaluated the severity of this issue to be in the Important severity range with a maximum CVSSv3 base score of 8.3.

Vulnerability class: XSS (Cross-Site Scripting)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.013 (70.9th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2020-3955: held from 0.013 to 0.013.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

  • VMware Esxi — versions ESXi 6.7 without patch ESXi670-202004103-SG, 6.7, ESXi 6.5 without patch ESXi650-201912104-SG

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2020-3955?
CVE-2020-3955 is a critical-severity vulnerability in VMware Esxi, classified under Cross-site Scripting. CVSS score: 9.3/10. Published 2020-04-29.
How severe is CVE-2020-3955?
Critical severity. CVSS v3 base score is 9.3 out of 10.