CVE-2021-20473

Name: CVE-2021-20473
Creator: NVD / NIST
Published: 2021-10-07T18:15:07.977+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.46%

Last modified Jun 17, 2026

CVE-2021-20473 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. IBM Sterling File Gateway User Interface 2.2.0.0 through 6.1.1.0 does not invalidate session after logout which could allow an authenticated user to impersonate another user on the system. IBM X-Force ID: 196944.. EPSS estimates a 0.46% chance of exploitation in the next 30 days.

Description

IBM Sterling File Gateway User Interface 2.2.0.0 through 6.1.1.0 does not invalidate session after logout which could allow an authenticated user to impersonate another user on the system. IBM X-Force ID: 196944.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.46%

36.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-613

Affected Software

Vendor	Product	Versions
Ibm	Sterling File Gateway	>= 2.2.0.0, <= 5.2.6.5_3
Ibm	Sterling File Gateway	>= 6.0.0.0, <= 6.0.3.4
Ibm	Sterling File Gateway	>= 6.1.0.0, <= 6.1.0.1

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/196944VDB Entry, Vendor Advisory
https://www.ibm.com/support/pages/node/6496785Patch, Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/196944VDB Entry, Vendor Advisory
https://www.ibm.com/support/pages/node/6496785Patch, Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2021-20473?

How severe is CVE-2021-20473?

CVE-2021-20473 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.46% probability of exploitation in the next 30 days.

How do I fix CVE-2021-20473?

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-2021-20473?

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

Scan your code now

Source: NVD / NIST