Is CVE-2018-20239 in the CISA KEV catalog?

No. CVE-2018-20239 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-20239?

CVE-2018-20239 has a CVSS v3 base score of 5.4 (MEDIUM).

What is the EPSS score for CVE-2018-20239?

CVE-2018-20239 has an EPSS score of 3.40% (87th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-20239?

Upgrade application links to 6.0.4 or later. Fixes are available for 8 affected products.

CVE & CISA-KEV Catalog

CVE-2018-20239

MEDIUMEPSS 87th pctl

5.4

CVSS v3

NVD

Description

Application Links before version 5.0.11, from version 5.1.0 before 5.2.10, from version 5.3.0 before 5.3.6, from version 5.4.0 before 5.4.12, and from version 6.0.0 before 6.0.4 allows remote attackers to inject arbitrary HTML or JavaScript via a cross site scripting (XSS) vulnerability in the applinkStartingUrl parameter. The product is used as a plugin in various Atlassian products where the following are affected: Confluence before version 6.15.2, Crucible before version 4.7.0, Crowd before version 3.4.3, Fisheye before version 4.7.0, Jira before version 7.13.3 and 8.x before 8.1.0.

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

application linksNVD

Affected:>= 6.0.0, < 6.0.4Fixed in:6.0.4CVE-2018-20239derived from NVD

confluence data centerNVD

Affected:< 6.15.2Fixed in:6.15.2CVE-2018-20239derived from NVD

confluence serverNVD

Affected:< 6.15.2Fixed in:6.15.2CVE-2018-20239derived from NVD

crowdNVD

Affected:< 3.4.3Fixed in:3.4.3CVE-2018-20239derived from NVD

crucibleNVD

Affected:< 4.7.0Fixed in:4.7.0CVE-2018-20239derived from NVD

fisheyeNVD

Affected:< 4.7.0Fixed in:4.7.0CVE-2018-20239derived from NVD

jira data centerNVD

Affected:>= 8.0.0, < 8.1.0Fixed in:8.1.0CVE-2018-20239derived from NVD

jira serverNVD

Affected:>= 8.0.0, < 8.1.0Fixed in:8.1.0CVE-2018-20239derived from NVD

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 RequiredLow

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

3.40%probability of exploitation in 30 days

87thpercentile

Elevated risk: more likely to be exploited than 87% of all known CVEs.

References

Vendor Advisory6

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.