CVE-2021-30056

Name: CVE-2021-30056
Creator: NVD / NIST
Published: 2021-04-05T11:15:11.617+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.62%

Last modified Jun 17, 2026

CVE-2021-30056 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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.. EPSS estimates a 0.62% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.62%

45.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Eng	Knowage	< 7.4

References

https://github.com/piuppi/Proof-of-Concepts/blob/main/Engineering/XSS-KnowageSuite.mdExploit, Third Party Advisory
https://github.com/piuppi/Proof-of-Concepts/blob/main/Engineering/XSS-KnowageSuite.mdExploit, Third Party Advisory

Timeline

Published: Apr 5, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-30056?

How severe is CVE-2021-30056?

CVE-2021-30056 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.62% probability of exploitation in the next 30 days.

How do I fix CVE-2021-30056?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-30056?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST