CVE-2021-20561

Name: CVE-2021-20561
Creator: NVD / NIST
Published: 2021-10-07T18:15:08.17+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.62%

Last modified Jun 17, 2026

CVE-2021-20561 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. IBM Sterling File Gateway 2.2.0.0 through 6.1.1.0 is vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session. EPSS estimates a 0.62% chance of exploitation in the next 30 days.

Description

IBM Sterling File Gateway 2.2.0.0 through 6.1.1.0 is vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session. IBM X-Force ID: 199230.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/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
Ibm	Sterling B2b Integrator	>= 2.2.0.0, <= 5.2.6.5_4
Ibm	Sterling B2b Integrator	>= 6.0.0.0, <= 6.0.0.6
Ibm	Sterling B2b Integrator	>= 6.0.1.0, <= 6.0.3.4
Ibm	Sterling B2b Integrator	>= 6.1.0.0, <= 6.1.0.2

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/199230VDB Entry, Vendor Advisory
https://www.ibm.com/support/pages/node/6496759Patch, Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/199230VDB Entry, Vendor Advisory
https://www.ibm.com/support/pages/node/6496759Patch, Vendor Advisory

Timeline

Published: Oct 7, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-20561?

How severe is CVE-2021-20561?

CVE-2021-20561 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.62% probability of exploitation in the next 30 days.

How do I fix CVE-2021-20561?

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-2021-20561?

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

Scan your code now

Source: NVD / NIST