CVE-2021-38944

Name: CVE-2021-38944
Creator: NVD / NIST
Published: 2022-05-18T20:15:08.107+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.54%

Last modified Jun 17, 2026

CVE-2021-38944 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. IBM DataPower Gateway 10.0.2.0 through 1.0.3.0, 10.0.1.0 through 10.0.1.5, and 2018.4.1.0 through 2018.4.1.18 is vulnerable to HTTP header injection, caused by improper validation of input by the HOST headers. This could allow an attacker to conduct various attacks against the vulnerable system, including cross-site scripting, cache poisoning or session hijacking. EPSS estimates a 0.54% chance of exploitation in the next 30 days.

Description

IBM DataPower Gateway 10.0.2.0 through 1.0.3.0, 10.0.1.0 through 10.0.1.5, and 2018.4.1.0 through 2018.4.1.18 is vulnerable to HTTP header injection, caused by improper validation of input by the HOST headers. This could allow an attacker to conduct various attacks against the vulnerable system, including cross-site scripting, cache poisoning or session hijacking. IBM X-Force ID: 211236.

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

0.54%

41.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Ibm	Datapower Gateway	>= 10.0.1.0, <= 10.0.1.5
Ibm	Datapower Gateway	>= 10.0.2.0, <= 10.0.3.0
Ibm	Datapower Gateway	>= 2018.4.1.0, <= 2018.4.1.18

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/211236VDB Entry, Vendor Advisory
https://www.ibm.com/support/pages/node/6587070Patch, Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/211236VDB Entry, Vendor Advisory
https://www.ibm.com/support/pages/node/6587070Patch, Vendor Advisory

Timeline

Published: May 18, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-38944?

How severe is CVE-2021-38944?

CVE-2021-38944 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.54% probability of exploitation in the next 30 days.

How do I fix CVE-2021-38944?

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-2021-38944?

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

Scan your code now

Source: NVD / NIST