{"cve":"CVE-2013-4891","nvd":{"published":"2018-02-21T16:29:00.190","modified":"2026-06-16T23:58:04.373","status":"Modified","description":"The xss_clean function in CodeIgniter before 2.1.4 might allow remote attackers to bypass an intended protection mechanism and conduct cross-site scripting (XSS) attacks via an unclosed HTML tag.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["https://github.com/bcit-ci/CodeIgniter/issues/4020","https://nealpoole.com/blog/2013/07/codeigniter-21-xss-clean-filter-bypass/","https://www.codeigniter.com/userguide2/changelog.html","https://github.com/bcit-ci/CodeIgniter/issues/4020","https://nealpoole.com/blog/2013/07/codeigniter-21-xss-clean-filter-bypass/"],"products":["codeigniter:codeigniter"],"source":"nvd","synced_at":"2026-10-19T20:48:34.567387330+00:00"},"epss":{"cve":"CVE-2013-4891","score":0.01425,"percentile":0.72921,"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."]}