{"cve":"CVE-2012-4144","nvd":{"published":"2012-08-06T16:55:07.150","modified":"2026-06-16T23:44:28.177","status":"Modified","description":"Opera before 12.01 on Windows and UNIX, and before 11.66 and 12.x before 12.01 on Mac OS X, does not properly escape characters in DOM elements, which makes it easier for remote attackers to bypass cross-site scripting (XSS) protection mechanisms via a crafted HTML document.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-79"],"references":["http://www.opera.com/docs/changelogs/mac/1166/","http://www.opera.com/docs/changelogs/mac/1201/","http://www.opera.com/docs/changelogs/unix/1201/","http://www.opera.com/docs/changelogs/windows/1201/","http://www.opera.com/support/kb/view/1025/"],"products":["opera:opera_browser"],"source":"nvd","synced_at":"2026-10-19T20:24:00.973572543+00:00"},"epss":{"cve":"CVE-2012-4144","score":0.01198,"percentile":0.68129,"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."]}