How severe is CVE-2020-4706?

CVE-2020-4706 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 no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-4706 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-4706?

CVE-2020-4706 affects Ibm Api Connect. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-4706?

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

When was CVE-2020-4706 published?

CVE-2020-4706 was published on 2021-08-17 and last updated on 2026-06-17.

CVE-2020-4706

CVE-2020-4706 is a medium-severity vulnerability in Ibm Api Connect 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 5.5
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Ibm Api Connect
Published: 2021-08-17
Last modified: 2026-06-17

Description

IBM API Connect 5.0.0.0 through 5.0.8.10 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: 187194.

Frequently asked questions

What is CVE-2020-4706?: IBM API Connect 5.0.0.0 through 5.0.8.10 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: 187194.
How severe is CVE-2020-4706?: CVE-2020-4706 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 no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-4706 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-4706?: CVE-2020-4706 affects Ibm Api Connect. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-4706?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-4706 published?: CVE-2020-4706 was published on 2021-08-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ibm:api_connect:*:*:*:*:*:*:*:*

More vulnerabilities in Ibm Api Connect

CVE-2019-4202 — Critical (CVSS 10.0): IBM API Connect 5.0.0.0 and 5.0.8.6 Developer Portal is vulnerable to command injection. An attacker with a specially…
CVE-2025-13915 — Critical (CVSS 9.8): IBM API Connect 10.0.8.0 through 10.0.8.5, and 10.0.11.0 could allow a remote attacker to bypass authentication…
CVE-2021-29772 — Critical (CVSS 9.8): IBM API Connect 5.0.0.0 through 5.0.8.11 could allow a user to potentially inject code due to unsanitized user input.…
CVE-2019-4203 — Critical (CVSS 9.8): IBM API Connect 5.0.0.0 and 5.0.8.6 Developer Portal can be exploited by app developers to download arbitrary files…
CVE-2019-4008 — Critical (CVSS 9.8): API Connect V2018.1 through 2018.4.1.1 is impacted by access token leak. Authorization tokens in some URLs can result…
CVE-2018-1469 — Critical (CVSS 9.8): IBM API Connect Developer Portal 5.0.0.0 through 5.0.8.2 could allow an unauthenticated attacker to execute system…

All CVEs affecting Ibm Api Connect →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →