Is CVE-2018-1000078 in the CISA KEV catalog?

No. CVE-2018-1000078 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-1000078?

CVE-2018-1000078 has a CVSS v3 base score of 6.1 (MEDIUM).

What is the EPSS score for CVE-2018-1000078?

CVE-2018-1000078 has an EPSS score of 2.84% (85th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-1000078?

Upgrade jruby on debian 12 to 9.1.17.0-1 or later. Fixes are available for 8 affected products.

CVE & CISA-KEV Catalog

CVE-2018-1000078

MEDIUMEPSS 85th pctl

6.1

CVSS v3

NVD

Description

RubyGems version Ruby 2.2 series: 2.2.9 and earlier, Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series: 2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier, prior to trunk revision 62422 contains a Cross Site Scripting (XSS) vulnerability in gem server display of homepage attribute that can result in XSS. This attack appear to be exploitable via the victim must browse to a malicious gem on a vulnerable gem server. This vulnerability appears to have been fixed in 2.7.6.

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

jrubyDebian

Fixed in:9.1.17.0-1CVE-2018-1000078

libruby1.9.1Ubuntu

Fixed in:1.9.3.484-2ubuntu1.8USN-3621-1

libruby2.0Ubuntu

Fixed in:2.0.0.484-1ubuntu2.6USN-3621-1

libruby2.3Ubuntu

Fixed in:2.3.1-2~16.04.7USN-3621-1

ruby1.9.1Ubuntu

Fixed in:1.9.3.484-2ubuntu1.8USN-3621-1

ruby1.9.3Ubuntu

Fixed in:1.9.3.484-2ubuntu1.8USN-3621-1

ruby2.0Ubuntu

Fixed in:2.0.0.484-1ubuntu2.6USN-3621-1

ruby2.3Ubuntu

Fixed in:2.3.1-2~16.04.7USN-3621-1

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 InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploit Intelligence

2.84%probability of exploitation in 30 days

85thpercentile

Elevated risk: more likely to be exploited than 85% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

blog.rubygems.org

Third-Party Advisory2

Other references14

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.