Leostream develops a connection broker and associated agent software for remote desktop and application delivery, with a limited but durable vulnerability record concentrated in web-facing input handling and file-access control. The recurring weaknesses—including cross-site scripting, link-following flaws, and unrestricted file uploads—reflect typical risks in connection-management interfaces where user input parsing and file operations are fundamental to the product's function. Current severity, exploitation, and exposure counts are shown alongside this summary.
The number and severity of CVEs published that impact products developed by Leostream over time
Signals from CVEs in this vendor scope (5 CVEs).
5 CVEs · Highest risk first
| CVE | Published | CVSS | Risk | KEV | Exploit |
|---|---|---|---|---|---|
CVE-2020-26574CRITICAL Leostream Connection Broker 8.2.x is affected by stored XSS. An unauthenticated attacker can inject arbitrary JavaScript code via the webquery.pl User-Agent HTTP header. It is rend | Oct 6, 2020 | 9.6 | 30 | NO | NO |
CVE-2021-41550HIGH Leostream Connection Broker 9.0.40.17 allows administrator to upload and execute Perl code. | Jan 18, 2022 | 7.2 | 24 | NO | NO |
CVE-2018-18817HIGH The Leostream Agent before Build 7.0.1.0 when used with Leostream Connection Broker 8.2.72 or earlier allows remote attackers to modify registry keys via the Leostream Agent API. | Oct 30, 2018 | 7.5 | 24 | NO | NO |
CVE-2021-38157MEDIUM 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 lo | Aug 6, 2021 | 6.1 | 21 | NO | NO |
CVE-2021-41551MEDIUM Leostream Connection Broker 9.0.40.17 allows administrators to conduct directory traversal attacks by uploading z ZIP file that contains a symbolic link. | Jan 18, 2022 | 4.9 | 19 | NO | NO |
Signals from CVEs in this vendor scope (5 CVEs).
An overview of all social media posts that mention a CVE ID that affects a product developed by Leostream.
Media articles that mention a CVE ID that affects a product developed by Leostream — matched by CVE ID, not by vendor name.