How severe is CVE-2021-44726?

CVE-2021-44726 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity low, and availability low.

Is CVE-2021-44726 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-44726?

CVE-2021-44726 affects Knime Knime Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-44726?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-44726 published?

CVE-2021-44726 was published on 2021-12-08 and last updated on 2026-06-17.

CVE-2021-44726

CVE-2021-44726 is a high-severity vulnerability in Knime Knime Server with a CVSS 3.x base score of 8.8. 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: High (CVSS 3.x base score 8.8)
CVSS v2: 4.3
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Knime Knime Server
Published: 2021-12-08
Last modified: 2026-06-17

Description

KNIME Server before 4.13.4 allows XSS via the old WebPortal login page.

Frequently asked questions

What is CVE-2021-44726?: KNIME Server before 4.13.4 allows XSS via the old WebPortal login page.
How severe is CVE-2021-44726?: CVE-2021-44726 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity low, and availability low.
Is CVE-2021-44726 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-44726?: CVE-2021-44726 affects Knime Knime Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-44726?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-44726 published?: CVE-2021-44726 was published on 2021-12-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:knime:knime_server:*:*:*:*:*:*:*:*

More vulnerabilities in Knime Knime Server

CVE-2021-44725 — High (CVSS 7.5): KNIME Server before 4.13.4 allows directory traversal in a request for a client profile.
CVE-2022-44748 — High (CVSS 7.1): A directory traversal vulnerability in the ZIP archive extraction routines of KNIME Server since 4.3.0 can result in…
CVE-2021-45097 — Low (CVSS 2.9): KNIME Server before 4.12.6 and 4.13.x before 4.13.4 (when installed in unattended mode) keeps the administrator's…

All CVEs affecting Knime Knime Server →

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 →