{"cve":"CVE-2021-20308","nvd":{"published":"2021-04-05T22:15:12.947","modified":"2026-06-17T03:33:38.797","status":"Modified","description":"Integer overflow in the htmldoc 1.9.11 and before may allow attackers to execute arbitrary code and cause a denial of service that is similar to CVE-2017-9181.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-190"],"references":["https://bugzilla.redhat.com/show_bug.cgi?id=1946289","https://github.com/michaelrsweet/htmldoc/issues/423","https://lists.debian.org/debian-lts-announce/2021/07/msg00000.html","https://bugzilla.redhat.com/show_bug.cgi?id=1946289","https://github.com/michaelrsweet/htmldoc/issues/423"],"products":["debian:debian_linux","htmldoc_project:htmldoc"],"source":"nvd","synced_at":"2026-10-19T21:17:01.373894544+00:00"},"epss":{"cve":"CVE-2021-20308","score":0.02477,"percentile":0.84559,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}