CVE-2021-29872

Name: CVE-2021-29872
Creator: NVD / NIST
Published: 2022-01-18T17:15:08.353+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.77%

Last modified Jun 17, 2026

CVE-2021-29872 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. IBM Cloud Pak for Automation 21.0.1 and 21.0.2 - Business Automation Studio Component is vulnerable to HTTP header injection, caused by improper validation of input by the HOST headers. By sending a specially crafted HTTP request, a remote attacker could exploit this vulnerability to inject HTTP HOST header, which will allow the attacker to conduct various attacks against the vulnerable system, including cross-site scripting, cache poisoning or session hijacking. EPSS estimates a 0.77% chance of exploitation in the next 30 days.

Description

IBM Cloud Pak for Automation 21.0.1 and 21.0.2 - Business Automation Studio Component is vulnerable to HTTP header injection, caused by improper validation of input by the HOST headers. By sending a specially crafted HTTP request, a remote attacker could exploit this vulnerability to inject HTTP HOST header, which will allow the attacker to conduct various attacks against the vulnerable system, including cross-site scripting, cache poisoning or session hijacking. IBM X-Force ID: 206228.

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

0.77%

51.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-116

Affected Software

Vendor	Product	Versions
Ibm	Cloud Pak For Automation	< 21.0.2
Ibm	Cloud Pak For Automation	21.0.2
Ibm	Cloud Pak For Automation	< 21.0.1
Ibm	Cloud Pak For Automation	21.0.1

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/206228VDB Entry, Vendor Advisory
https://www.ibm.com/support/pages/node/6541294Patch, Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/206228VDB Entry, Vendor Advisory
https://www.ibm.com/support/pages/node/6541294Patch, Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2021-29872?

How severe is CVE-2021-29872?

CVE-2021-29872 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.77% probability of exploitation in the next 30 days.

How do I fix CVE-2021-29872?

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-2021-29872?

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

Scan your code now

Source: NVD / NIST