{"id":"CVE-2026-34568","aliases":["EUVD-2026-18082","GHSA-x7wh-g25g-53vg"],"status":"published","title":"CI4MS: Blogs Posts Full Account Takeover for All-Roles \u0026 Privilege-Escalation via Stored DOM XSS","description":"CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to version 0.31.0.0, the application fails to properly sanitize user-controlled input when creating or editing blog posts. An attacker can inject a malicious JavaScript payload into blog post content, which is then stored server-side. This stored payload is later rendered unsafely in multiple application views without proper output encoding, leading to stored cross-site scripting (XSS). This issue has been patched in version 0.31.0.0.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00323,"percentile":0.25579,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2026-04-01T21:28:55Z","modified":"2026-10-28T02:31:05Z","fixes":[{"ecosystem":"Packagist","package":"ci4-cms-erp/ci4ms","fixed_in":["0.31.0.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"ci4-cms-erp/ci4ms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.28.6.0"},{"fixed":"0.31.0.0"}]}]},{"source":"osv","ecosystem":"Packagist","package":"ci4-cms-erp/ci4ms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.31.0.0"}]}],"versions":["0.21.0","0.21.1","0.21.2","0.21.3","0.21.3.1","0.21.3.2","0.21.3.3","0.21.3.4","0.21.3.5","0.21.3.6","0.21.3.7","0.23.0.0","0.23.0.1","0.23.0.2","0.23.1.0","0.24.0.0","0.24.0.16","0.24.0.18","0.24.0.19","0.24.0.20","0.24.0.27","0.24.0.42","0.24.0.45","0.24.0.60","0.25.0.0","0.25.0.1","0.25.0.2","0.25.0.30","0.25.0.39","0.25.0.43","0.25.1.0","0.25.2.0","0.25.3.0","0.26.0.0","0.26.1.0","0.26.2.0","0.26.3.0","0.26.3.1","0.26.3.2","0.26.3.3","0.26.3.4","0.27.0.0","0.28.0.0","0.28.3.0","0.28.4.0","0.28.5.0","0.28.6.0"]}],"products":[{"vendor":"ci4-cms-erp","product":"ci4ms"}],"references":[{"url":"https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-x7wh-g25g-53vg","tags":["x_refsource_CONFIRM","exploit","Exploit","Vendor Advisory","advisory","web"]},{"url":"https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.0.0","tags":["x_refsource_MISC","Release Notes","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34568","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-x7wh-g25g-53vg"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34568.json","tags":["advisory"]},{"url":"https://github.com/ci4-cms-erp/ci4ms","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-34568","title":"CI4MS: Blogs Posts Full Account Takeover for All-Roles \u0026 Privilege-Escalation via Stored DOM XSS","description":"CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to version 0.31.0.0, the application fails to properly sanitize user-controlled input when creating or editing blog posts. An attacker can inject a malicious JavaScript payload into blog post content, which is then stored server-side. This stored payload is later rendered unsafely in multiple application views without proper output encoding, leading to stored cross-site scripting (XSS). This issue has been patched in version 0.31.0.0.","status":"published","published":"2026-04-01T21:28:55.727Z","modified":"2026-04-02T13:51:49.965Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L","level":"critical","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:20:13.962274Z"}],"euvd":[{"id":"EUVD-2026-18082","description":"CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to version 0.31.0.0, the application fails to properly sanitize user-controlled input when creating or editing blog posts. An attacker can inject a malicious JavaScript payload into blog post content, which is then stored server-side. This stored payload is later rendered unsafely in multiple application views without proper output encoding, leading to stored cross-site scripting (XSS). This issue has been patched in version 0.31.0.0.","status":"published","published":"2026-04-01T21:28:55Z","modified":"2026-04-02T13:51:49Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L","level":"critical"}],"updated_at":"2026-11-02T19:25:23.121433Z"}],"ghsa":[{"id":"GHSA-x7wh-g25g-53vg","title":"CI4MS: Blogs Posts Full Account Takeover for All-Roles \u0026 Privilege-Escalation via Stored DOM XSS","description":"## Summary\n### **Vulnerability: Stored DOM XSS via Blog Post Content (Persistent Payload Injection)**\n- Stored Cross-Site Scripting via Unsanitized Blog Post Content in Blog Management\n\n### Description\nThe application fails to properly sanitize user-controlled input when creating or editing blog posts. An attacker can inject a malicious JavaScript payload into blog post content, which is then stored server-side.\n\nThis stored payload is later rendered unsafely in multiple application views without proper output encoding, leading to stored cross-site scripting (XSS).\n\n### Affected Functionality\n- Blog post creation functionality\n- Blog post editing functionality\n- Blog post storage and retrieval logic\n\n### Attack Scenario\n- An attacker creates or edits a blog post to include a malicious XSS payload.\n- The application stores this content without sanitization or encoding.\n- The payload persists and executes whenever the blog post is rendered in affected views.\n\n### Impact\n- Persistent Stored XSS\n- Execution of arbitrary JavaScript in victims’ browsers\n- Privilege escalation when viewed by administrators or privileged users\n- Full administrator account takeover\n- Full account takeover across all roles\n- Full compromise of the entire application\n\nEndpoints:\n- `/backend/blogs/create`\n- `/backend/blogs/`\n- `/blog/{id}`\n\n## Steps To Reproduce (POC)\n1. Go to the Blog Post Create or Edit page\n2. Insert an XSS payload into the blog post content such as:\n`\u003cimg src=x onerror=alert(document.domain)\u003e`\n3. Save or publish the blog post\n4. View the post via the administrative panel or public blog page\n5. Notice the XSS payload executing automatically\n\n## Remediation\n\n- **Avoid unsafe DOM manipulation methods:** Do not use `.html()`, `innerHTML`, or similar sink functions in client-side JavaScript or server-side templating (e.g., PHP). Even when user input flowing into these sinks is not immediately apparent, they can introduce Cross-Site Scripting (XSS) vulnerabilities that an attacker may exploit.\n\n- **Apply output encoding:** Implement HTML entity encoding on all user-controlled data before rendering it in the browser. This helps neutralize potentially malicious input.\n\n- **Implement input sanitization:** Ensure that all user-supplied input is properly sanitized before processing or output. Currently, no sanitization mechanisms are in place, which should be addressed as a priority.\n\n- **Enforce security headers and cookie attributes:**\n  - **Content Security Policy (CSP):** Define and enforce a strict CSP to limit the execution of unauthorized scripts.\n  - **HttpOnly flag:** Set the `HttpOnly` attribute on session cookies to prevent client-side script access.\n  - **SameSite attribute:** Configure the `SameSite` cookie attribute to mitigate Cross-Site Request Forgery (CSRF) risks.\n  - **Secure flag:** Ensure all cookies are transmitted only over HTTPS by enabling the `Secure` attribute.\n\n  These measures collectively reduce the impact of XSS and help prevent escalation paths such as CSRF via XSS.\n\n# Ready Video POC:\n https://mega.nz/file/bYtCQRqT#ph1S_01XaYXiNTzanP3AVL6aQMe0YC5Py7Gko1FoT4A","status":"published","published":"2026-04-01T22:07:13Z","modified":"2026-04-06T17:14:40Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L","level":"critical"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:39:48.966685Z"}],"nvd":[{"id":"CVE-2026-34568","description":"CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to version 0.31.0.0, the application fails to properly sanitize user-controlled input when creating or editing blog posts. An attacker can inject a malicious JavaScript payload into blog post content, which is then stored server-side. This stored payload is later rendered unsafely in multiple application views without proper output encoding, leading to stored cross-site scripting (XSS). This issue has been patched in version 0.31.0.0.","status":"published","published":"2026-04-01T22:16:20.57Z","modified":"2026-10-26T00:10:00.15Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L","level":"critical","assessor":"secondary"},{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:12.73929Z"}],"osv":[{"id":"CVE-2026-34568","title":"CI4MS: Blogs Posts Full Account Takeover for All-Roles \u0026 Privilege-Escalation via Stored DOM XSS","description":"CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to version 0.31.0.0, the application fails to properly sanitize user-controlled input when creating or editing blog posts. An attacker can inject a malicious JavaScript payload into blog post content, which is then stored server-side. This stored payload is later rendered unsafely in multiple application views without proper output encoding, leading to stored cross-site scripting (XSS). This issue has been patched in version 0.31.0.0.","status":"published","published":"2026-04-01T21:28:55.727Z","modified":"2026-10-28T02:31:05.359617692Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L","level":"critical"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:45:02.247031Z"},{"id":"GHSA-x7wh-g25g-53vg","title":"CI4MS: Blogs Posts Full Account Takeover for All-Roles \u0026 Privilege-Escalation via Stored DOM XSS","description":"## Summary\n### **Vulnerability: Stored DOM XSS via Blog Post Content (Persistent Payload Injection)**\n- Stored Cross-Site Scripting via Unsanitized Blog Post Content in Blog Management\n\n### Description\nThe application fails to properly sanitize user-controlled input when creating or editing blog posts. An attacker can inject a malicious JavaScript payload into blog post content, which is then stored server-side.\n\nThis stored payload is later rendered unsafely in multiple application views without proper output encoding, leading to stored cross-site scripting (XSS).\n\n### Affected Functionality\n- Blog post creation functionality\n- Blog post editing functionality\n- Blog post storage and retrieval logic\n\n### Attack Scenario\n- An attacker creates or edits a blog post to include a malicious XSS payload.\n- The application stores this content without sanitization or encoding.\n- The payload persists and executes whenever the blog post is rendered in affected views.\n\n### Impact\n- Persistent Stored XSS\n- Execution of arbitrary JavaScript in victims’ browsers\n- Privilege escalation when viewed by administrators or privileged users\n- Full administrator account takeover\n- Full account takeover across all roles\n- Full compromise of the entire application\n\nEndpoints:\n- `/backend/blogs/create`\n- `/backend/blogs/`\n- `/blog/{id}`\n\n## Steps To Reproduce (POC)\n1. Go to the Blog Post Create or Edit page\n2. Insert an XSS payload into the blog post content such as:\n`\u003cimg src=x onerror=alert(document.domain)\u003e`\n3. Save or publish the blog post\n4. View the post via the administrative panel or public blog page\n5. Notice the XSS payload executing automatically\n\n## Remediation\n\n- **Avoid unsafe DOM manipulation methods:** Do not use `.html()`, `innerHTML`, or similar sink functions in client-side JavaScript or server-side templating (e.g., PHP). Even when user input flowing into these sinks is not immediately apparent, they can introduce Cross-Site Scripting (XSS) vulnerabilities that an attacker may exploit.\n\n- **Apply output encoding:** Implement HTML entity encoding on all user-controlled data before rendering it in the browser. This helps neutralize potentially malicious input.\n\n- **Implement input sanitization:** Ensure that all user-supplied input is properly sanitized before processing or output. Currently, no sanitization mechanisms are in place, which should be addressed as a priority.\n\n- **Enforce security headers and cookie attributes:**\n  - **Content Security Policy (CSP):** Define and enforce a strict CSP to limit the execution of unauthorized scripts.\n  - **HttpOnly flag:** Set the `HttpOnly` attribute on session cookies to prevent client-side script access.\n  - **SameSite attribute:** Configure the `SameSite` cookie attribute to mitigate Cross-Site Request Forgery (CSRF) risks.\n  - **Secure flag:** Ensure all cookies are transmitted only over HTTPS by enabling the `Secure` attribute.\n\n  These measures collectively reduce the impact of XSS and help prevent escalation paths such as CSRF via XSS.\n\n# Ready Video POC:\n https://mega.nz/file/bYtCQRqT#ph1S_01XaYXiNTzanP3AVL6aQMe0YC5Py7Gko1FoT4A","status":"published","published":"2026-04-01T22:07:13Z","modified":"2026-04-06T17:38:13.022109Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L","level":"critical"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:59.835583Z"}]}}