CVE•Published 2022-02-16•Modified 2026-10-14•1 article on news•5 live references•NVD data

CVE-2022-25235Libexpat_project · Libexpat

Vulnerability data via NVD (ingested)

CVSS v3.1

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS percentile

Exploit Prediction Scoring System · top 8% of all CVEs

Weaknesses (CWE)

CWE-116Improper Encoding or Escaping of Output

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.

Timeline

Published 2022-02-16

Modified 2026-10-14

External references

NVD MITRE GitHub PoC trickest/cve VulnCheck

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 tag1 hosts

vuln:CVE-2022-25235

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Libexpat Project Libexpat"

All exposed Libexpat Project Libexpat instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Libexpat"

HTTP body or banner mentions "Libexpat" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2022-25235