VMware vRealize Log Insight (8.x prior to 8.4) contains a Cross Site Scripting (XSS) vulnerability due to improper user input validation.

published 2021-08-30 5y ago modified 2026-06-17 4mo ago also EUVD-2021-9190

cvss: 5.4; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits: 0; none known

VMware vRealize Log Insight (8.x prior to 8.4) contains a Cross Site Scripting (XSS) vulnerability due to improper user input validation. An attacker with user privileges may be able to inject a malicious payload via the Log Insight UI which would be executed when the victim accesses the shared dashboard link.

Patch / fix

fixed in 2 links 1

vmware cloud_foundation 4.3
vmware vrealize_log_insight 8.4

vmware.com/security/advisories/VMSA-2021-0019.html advisory

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Exploit prediction

0.47% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	3.5	AV:N/AC:M/Au:S/C:N/I:P/A:N

Affected products

n/a VMware vRealize Log Insight

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

Technology feeds

VMware rss critical rss

References

vmware.com /security/advisories/VMSA-2021-0019.html
patch, vendor-advisory

Sources

CVE List CVE-2021-22021
NVD CVE-2021-22021

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