Is CVE-2015-8861 in the CISA KEV catalog?

No. CVE-2015-8861 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-8861?

CVE-2015-8861 has a CVSS v3 base score of 6.1 (MEDIUM).

What is the EPSS score for CVE-2015-8861?

CVE-2015-8861 has an EPSS score of 3.00% (86th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-8861?

Upgrade handlebars.js to 4.0.0 or later.

CVE & CISA-KEV Catalog

CVE-2015-8861

MEDIUMEPSS 86th pctl

6.1

CVSS v3

NVD

Description

The handlebars package before 4.0.0 for Node.js allows remote attackers to conduct cross-site scripting (XSS) attacks by leveraging a template with an attribute that is not quoted.

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

handlebars.jsNVD

Affected:< 4.0.0Fixed in:4.0.0CVE-2015-8861derived 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 RequiredNone

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

3.00%probability of exploitation in 30 days

86thpercentile

Elevated risk: more likely to be exploited than 86% of all known CVEs.

References

Patch1

sourceclear.com

Third-Party Advisory3

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 2026-05-13.