How severe is CVE-2021-29872?

CVE-2021-29872 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-29872 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-29872?

CVE-2021-29872 primarily affects Ibm Cloud Pak For Automation. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-29872?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-29872 published?

CVE-2021-29872 was published on 2022-01-18 and last updated on 2026-06-17.

CVE-2021-29872

CVE-2021-29872 is a medium-severity vulnerability in Ibm Cloud Pak For Automation with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-116.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-116
Affected product: Ibm Cloud Pak For Automation
Published: 2022-01-18
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-29872?: 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.
How severe is CVE-2021-29872?: CVE-2021-29872 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-29872 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-29872?: CVE-2021-29872 primarily affects Ibm Cloud Pak For Automation. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-29872?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-29872 published?: CVE-2021-29872 was published on 2022-01-18 and last updated on 2026-06-17.

References

Affected products (15)

cpe:2.3:a:ibm:cloud_pak_for_automation:*:*:*:*:*:*:*:*
cpe:2.3:a:ibm:cloud_pak_for_automation:21.0.2:*:*:*:*:*:*:*
cpe:2.3:a:ibm:cloud_pak_for_automation:21.0.2:interim_fix001:*:*:*:*:*:*
cpe:2.3:a:ibm:cloud_pak_for_automation:21.0.2:interim_fix002:*:*:*:*:*:*
cpe:2.3:a:ibm:cloud_pak_for_automation:21.0.2:interim_fix003:*:*:*:*:*:*
cpe:2.3:a:ibm:cloud_pak_for_automation:21.0.2:interim_fix004:*:*:*:*:*:*
cpe:2.3:a:ibm:cloud_pak_for_automation:21.0.2:interim_fix005:*:*:*:*:*:*
cpe:2.3:a:ibm:cloud_pak_for_automation:21.0.2:interim_fix006:*:*:*:*:*:*
cpe:2.3:a:ibm:cloud_pak_for_automation:21.0.1:*:*:*:*:*:*:*
cpe:2.3:a:ibm:cloud_pak_for_automation:21.0.1:interim_fix001:*:*:*:*:*:*
cpe:2.3:a:ibm:cloud_pak_for_automation:21.0.1:interim_fix002:*:*:*:*:*:*
cpe:2.3:a:ibm:cloud_pak_for_automation:21.0.1:interim_fix003:*:*:*:*:*:*
cpe:2.3:a:ibm:cloud_pak_for_automation:21.0.1:interim_fix004:*:*:*:*:*:*
cpe:2.3:a:ibm:cloud_pak_for_automation:21.0.1:interim_fix005:*:*:*:*:*:*
cpe:2.3:a:ibm:cloud_pak_for_automation:21.0.1:interim_fix006:*:*:*:*:*:*

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