Is CVE-2018-21030 in the CISA KEV catalog?

No. CVE-2018-21030 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-21030?

CVE-2018-21030 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2018-21030?

CVE-2018-21030 has an EPSS score of 1.44% (70th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-21030?

Upgrade jupyter-notebook on debian 11 to 5.7.4-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2018-21030

MEDIUMEPSS 70th pctl

5.3

CVSS v3

NVD

Description

Jupyter Notebook before 5.5.0 does not use a CSP header to treat served files as belonging to a separate origin. Thus, for example, an XSS payload can be placed in an SVG document.

CWE-79Cross-Site Scripting (XSS)CWE-863Incorrect Authorization

How to fix

Remediation Available

jupyter-notebookDebian

Fixed in:5.7.4-1CVE-2018-21030

jupyter-notebookUbuntu

Fixed in:5.2.2-1ubuntu0.1USN-5585-1

Fixed in:6.0.3-2ubuntu0.1USN-5585-1

Fixed in:6.4.8-1ubuntu0.1USN-5585-1

python-notebookUbuntu

Fixed in:5.2.2-1ubuntu0.1USN-5585-1

python3-notebookUbuntu

Fixed in:5.2.2-1ubuntu0.1USN-5585-1

Fixed in:6.0.3-2ubuntu0.1USN-5585-1

Fixed in:6.4.8-1ubuntu0.1USN-5585-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Exploit Intelligence

1.44%probability of exploitation in 30 days

70thpercentile

Elevated risk: more likely to be exploited than 70% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory1

github.com

Other references1

lists.debian.org

Related Vulnerabilities

Other CWE-79 (Cross-Site Scripting (XSS)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-11022	Medium	6.9	99%	-	Fix
CVE-2019-3929	Critical	9.8	99%	KEV	Fix
CVE-2020-9496	Medium	6.1	99%	-	-
CVE-2023-28341	Medium	6.1	99%	-	Fix
CVE-2018-12998	Medium	6.1	98%	-	-
CVE-2025-4123	High	7.6	98%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.