CVE•Published 2020-12-02•Modified 2026-10-08•1 article on news•6 live references•NVD data
CVE-2020-13956Apache · Httpclient
Vulnerability data via NVD (ingested)
CVSS v3.1
5.3
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS percentile
95
Exploit Prediction Scoring System · top 5% of all CVEs
Weaknesses (CWE)
Description
Apache HttpClient versions prior to version 4.5.13 and 5.0.3 can misinterpret malformed authority component in request URIs passed to the library as java.net.URI object and pick the wrong target host for request execution.
Timeline
Published 2020-12-02
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 tag2 hosts
vuln:CVE-2020-13956Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Apache Httpclient"All exposed Apache Httpclient instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Httpclient"HTTP body or banner mentions "Httpclient" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2020-13956Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2020-13956Censys host search filtered to this CVE id.
grep.app
CVE-2020-13956Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2020-13956GitHub code search for direct mentions.
Google dork
"CVE-2020-13956" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.