CVE•Published 2020-07-14•Modified 2026-10-08•1 article on news•5 live references•NVD data
CVE-2020-13935Apache · Tomcat
Vulnerability data via NVD (ingested)
CVSS v3.1
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS percentile
100
Exploit Prediction Scoring System · top 0% of all CVEs
Weaknesses (CWE)
Description
The payload length in a WebSocket frame was not correctly validated in Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M1 to 9.0.36, 8.5.0 to 8.5.56 and 7.0.27 to 7.0.104. Invalid payload lengths could trigger an infinite loop. Multiple requests with invalid payload lengths could lead to a denial of service.
Timeline
Published 2020-07-14
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 tag346 hosts
vuln:CVE-2020-13935Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Apache Tomcat"All exposed Apache Tomcat instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Tomcat"HTTP body or banner mentions "Tomcat" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2020-13935Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2020-13935Censys host search filtered to this CVE id.
grep.app
CVE-2020-13935Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2020-13935GitHub code search for direct mentions.
Google dork
"CVE-2020-13935" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (6)
CVE-2020-139356 repos
Mr-xn/Penetration_Testing_POCHTML
渗透测试有关的POC、EXP、脚本、提权、小工具等---About penetration-testing python-script poc getshell csrf xss cms php-getshell domainmod-xss csrf-webshell cobub-razor cve rce sql sql-poc poc-exp bypas…
Threekiii/Awesome-POCJava
一个漏洞 PoC 知识库。A knowledge base for vulnerability PoCs(Proof of Concept), with 1k+ vulnerabilities.
taielab/awesome-hacking-listsunknown
A curated collection of top-tier penetration testing tools and productivity utilities across multiple domains. Join us to explore, contribute, and enhance your hacking toolkit!
SexyBeast233/SecBooksHTML
安全类各家文库大乱斗
nu11secur1ty/CVE-mitreC
https://cve.mitre.org/
harekrishnarai/Damn-vulnerable-scaJava
Damn Vulnerable SCA Application