CVE-2021-30056

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% 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 reflected cross-site scripting (XSS). An attacker can inject arbitrary web script in /restful-services/publish via the 'EXEC_FROM' parameter that can lead to data leakage.

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

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