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

published 2021-12-08 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-31541

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 55%
public exploits: 0; none known

Patch / fix

fixed in 1

knime knime_server 4.13.4

Exploit prediction

0.76% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.8	CVSS:3.1/AC:L/AV:N/A:L/C:H/I:L/PR:N/S:C/UI:R
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:L
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

docs.knime.com /2021-06/server_update_guide/index.html#_bugfixes
release-notes, vendor-advisory
zigrin.com /advisories/knime-server-dom-based-xss-in-a-login-panel/

Sources

CVE List CVE-2021-44726
NVD CVE-2021-44726

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary