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MEDIUM severity

CVE-2017-1000507 — canvas

MEDIUM

CVE-2017-1000507 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in austintoddj/canvas. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Canvs Canvas XSS Vulnerability

Also known asGHSA-94hc-7qc9-34rf
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
1 known
Exploitation data as of Oct 30, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.8%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs56th percentile — riskier than 56% of all scored CVEsHighest risk
0.00%0.43%0.86%1.29%0.3%0.8%May 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

1 pkg affected
🐘austintoddj/canvas

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

Description

Canvs Canvas version 3.4.2 contains a Cross Site Scripting (XSS) vulnerability in User's details that can result in denial of service and execution of javascript code.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🐘Packagistaustintoddj/canvasall versionsNo fix

Affected Products

1 product · 1 configurations
Application
canvascnvs
1 version
3.4.2
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.

Canvs Canvas version 3.4.2 contains a Cross Site Scripting (XSS) vulnera…

github.comNVDFeb 2018

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Remediation status

    The records we use list no patched version of austintoddj/canvas for CVE-2017-1000507. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    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

Canvs Canvas version 3.4.2 contains a Cross Site Scripting (XSS) vulnerability in User's details that can result in denial of service and execution of javascript code.
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CVE-2017-1000507: canvas XSS (Medium 5.4)