VULNERABILITY INTELLIGENCE

CVE-2020-26574

CVSS score9.6 CRITICAL

EPSS probability2.12%

CISA KEVNot currently listed

Published2020-10-06

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Description

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 rendered by the admins the next time they log in. The JavaScript injected can be used to force the admin to upload a malicious Perl script that will be executed as root via libMisc::browser_client. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

Weakness classification

nvd@nist.gov: CWE-79

Primary references

cve@mitre.org — Exploit, Third Party Advisory
cve@mitre.org — Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Vendor Advisory