CVE•Published 2020-09-30•Modified 2026-10-08•1 article on news•5 live references•NVD data
CVE-2019-20920Handlebarsjs · Handlebars
Vulnerability data via NVD (ingested)
CVSS v3.1
8.1
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:L
EPSS percentile
88
Exploit Prediction Scoring System · top 12% of all CVEs
Weaknesses (CWE)
Description
Handlebars before 3.0.8 and 4.x before 4.5.3 is vulnerable to Arbitrary Code Execution. The lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript. This can be used to run arbitrary code on a server processing Handlebars templates or in a victim's browser (effectively serving as XSS).
Timeline
Published 2020-09-30
Modified 2026-10-08
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2019-20920Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Handlebarsjs Handlebars"All exposed Handlebarsjs Handlebars instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Handlebars"HTTP body or banner mentions "Handlebars" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2019-20920Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2019-20920Censys host search filtered to this CVE id.
grep.app
CVE-2019-20920Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2019-20920GitHub code search for direct mentions.
Google dork
"CVE-2019-20920" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2019-20920 on GitHub.