{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-34559","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-03-30T16:31:39.265Z","datePublished":"2026-04-01T21:20:51.450Z","dateUpdated":"2026-04-02T16:23:56.044Z"},"containers":{"cna":{"title":"CI4MS: Blogs Tags Full Account Takeover for All-Roles & Privilege-Escalation via Stored DOM XSS","problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L","version":"3.1"}}],"references":[{"name":"https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-4333-387x-w245","tags":["x_refsource_CONFIRM"],"url":"https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-4333-387x-w245"},{"name":"https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.0.0","tags":["x_refsource_MISC"],"url":"https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.0.0"}],"affected":[{"vendor":"ci4-cms-erp","product":"ci4ms","versions":[{"version":"< 0.31.0.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-04-01T21:20:51.450Z"},"descriptions":[{"lang":"en","value":"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 tags. An attacker can inject a malicious JavaScript payload into the tag name field, which is then stored server-side. This stored payload is later rendered unsafely across public tag pages and administrative interfaces without proper output encoding, leading to stored cross-site scripting (XSS). This issue has been patched in version 0.31.0.0."}],"source":{"advisory":"GHSA-4333-387x-w245","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-4333-387x-w245","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-02T15:12:43.806600Z","id":"CVE-2026-34559","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-02T16:23:56.044Z"}}]}}