{"cve":"CVE-2022-25235","nvd":{"published":"2022-02-16T01:15:07.607","modified":"2026-10-14T16:17:28.010","status":"Modified","description":"xmltok_impl.c in Expat (aka libexpat) before 2.4.5 lacks certain validation of encoding, such as checks for whether a UTF-8 character is valid in a certain context.","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-116"],"references":["http://www.openwall.com/lists/oss-security/2022/02/19/1","https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf","https://github.com/libexpat/libexpat/pull/562","https://lists.debian.org/debian-lts-announce/2022/03/msg00007.html","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3UFRBA3UQVIQKXTBUQXDWQOVWNBKLERU/"],"products":["debian:debian_linux","fedoraproject:fedora","libexpat_project:libexpat","oracle:http_server","oracle:zfs_storage_appliance_kit","siemens:sinema_remote_connect_server"],"source":"nvd","synced_at":"2026-10-19T21:28:04.509275555+00:00"},"epss":{"cve":"CVE-2022-25235","score":0.04955,"percentile":0.92115,"date":"2026-10-25"},"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."]}