CVE-2021-38157

MEDIUM 6.1CVE-2021-38157 · Published 06/08/2021 · updated 17/06/2026

In short

CVE-2021-38157 is a MEDIUM (CVSS 6.1) vulnerability affecting connection broker (leostream).
Chance of exploitation in the next 30 days (EPSS): 1.1%, higher than 66.3% of all vulnerabilities.
Fix: update to 9.0.34.3 or later.

Package	Affected versions	Patched versions
connection broker leostream	`≥ 9.0.3, < 9.0.34.3`	`9.0.34.3`

Description

LeoStream Connection Broker 9.x before 9.0.34.3 allows Unauthenticated Reflected XSS via the /index.pl user parameter. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

References

dgccpa.com · Third Party Advisory
gist.github.com/erud1te-sec/5c85924cb78ba85af42e0b7b62a5ec91 · Exploit
leostream.com · Vendor Advisory
leostream.com/resources-2/product-lifecycle · Vendor Advisory

More vulnerabilities in connection broker

See all →

Running one of these products? Scan your site to see whether it exposes a vulnerable version.

Scan my site free

Package

Affected versions

Patched versions

connection broker

leostream

≥ 9.0.3, < 9.0.34.3

9.0.34.3

More vulnerabilities in connection broker

See all →