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CVE-2015-8861

23
FAUCET Score

CVE-2015-8861 describes a cross-site scripting (XSS) vulnerability in the handlebars.js package prior to version 4.0.0, affecting Node.js applications. This medium-severity flaw (CVSS 6.1) allows remote attackers to inject malicious scripts by exploiting unquoted attributes within templates, potentially leading to client-side code execution and data theft. While the vulnerability is easily exploitable with low attack complexity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.0.0CPE matchmatch criteria
cpe:2.3:a:handlebars.js_project:handlebars.js:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.00%
Probability of exploitation in next 30 days
EPSS Percentile
85.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0300 is in the 94th percentile among its peer group of 26,209 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

npmpatch availablevia ghsa
Product: handlebarsFixed in: 4.0.0

Vendor Advisories (1)

npmGHSA-9prh-257w-9277medium

Cross-Site Scripting in handlebars

Oct 23, 2018

References

sourceclear.com / blog/handlebars_vulnerability_research_findings
PatchThird Party Advisory
tenable.com / security/tns-2016-18
Third Party Advisory
openwall.com / lists/oss-security/2016/04/20/11
Mailing ListThird Party Advisory
securityfocus.com / bid/96434
Third Party AdvisoryVDB Entry