{"id":"CVE-2026-45138","aliases":["GHSA-2m69-jmvh-6chr"],"url":"https://o3.security/vulnerability/CVE-2026-45138","summary":"CI4MS: Stored XSS in Blog Content via Broken `html_purify` Validation Rule","details":"CI4MS is a CodeIgniter 4-based content management system skeleton. Prior to version 0.31.9.0, the custom `html_purify` validation rule used to sanitize blog post bodies relies on by-reference mutation (`?string &$str`), but CodeIgniter 4's validator passes a local copy of the value, so the sanitized text is silently discarded. The Blog controller writes `$lanData['content']` directly into `blog_langs.content`, and the public template echoes it without escaping — yielding stored XSS executable in any visitor's browser, including the superadmin when previewing or editing posts. Version 0.31.9.0 patches the issue.","published":"2026-07-19T23:18:51.312Z","modified":"2026-08-12T03:51:09.274234901Z","cvss":{"score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"},"epss":{"score":0.00146,"percentile":0.04391,"asOf":"2026-08-14"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"ci4-cms-erp/ci4ms","fixedVersion":"0.31.9.0"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.9.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45138.json"},{"type":"ADVISORY","url":"https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-2m69-jmvh-6chr"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45138"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:09.274234901Z"}}