CVE-2021-30058

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-04-05 · updated 2026-06-17
Weakness: CWE-79

Description

Knowage Suite before 7.4 is vulnerable to cross-site scripting (XSS). An attacker can inject arbitrary external script in '/knowagecockpitengine/api/1.0/pages/execute' via the 'SBI_HOST' parameter.

Affected products

KnowageLabs Knowage-Server: before 7.4 — fixed in 7.4

How to fix

Upgrade to a fixed version: KnowageLabs Knowage-Server 7.4. Check the vendor advisory for mitigations.

References

https://github.com/piuppi/Proof-of-Concepts/blob/main/Engineering/XSSI-KnowageSuite.md
https://github.com/piuppi/Proof-of-Concepts/blob/main/Engineering/XSSI-KnowageSuite.md

Get alerted when CVE-2021-30058 or the next vulnerability affects your stack