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Not in CISA KEV
MEDIUM severity

CVE-2015-1866 — ember-source

MEDIUM

CVE-2015-1866 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in ember-source. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for ember-source — see the affected versions and patch details below.

ember-source vulnerable to Cross-site Scripting

Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
1 known
Exploitation data as of Oct 23, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.1%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs66th percentile — riskier than 66% of all scored CVEsHighest risk
0.00%0.54%1.08%1.62%0.3%1.1%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

2 pkgs affected
💎ember-source💎ember-source

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects RubyGems packages — download data is not available via public APIs for these ecosystems.

Description

Cross-site scripting (XSS) vulnerability in Ember.js 1.10.x before 1.10.1 and 1.11.x before 1.11.2.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
💎RubyGemsember-source≥ 1.10.0&&< 1.10.11.10.1bundle update ember-source --conservative
💎RubyGemsember-source≥ 1.11.0&&< 1.11.21.11.2bundle update ember-source --conservative

Affected Products

1 product · 12 configurations
Application
ember.jsemberjs
3 versions
1.10.01.11.01.11.1
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Cross-site scripting (XSS) vulnerability in Ember.js 1.10.x before 1.10.…

openwall.comNVDSep 2017

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for ember-source, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update ember-source to 1.10.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2015-1866 is resolved across your whole dependency graph.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

Cross-site scripting (XSS) vulnerability in Ember.js 1.10.x before 1.10.1 and 1.11.x before 1.11.2.
O3 Security · Impact-Aware SCA

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CVE-2015-1866: ember-source XSS — Fixed in 1.10.1