{"id":"CVE-2026-70593","published":"2026-08-04T22:17:17.290","lastModified":"2026-08-05T15:17:15.990","description":"Ghost is a Node.js content management system. From 0.10.0 until 6.54.1, a vulnerability in custom themes allowed a staff user to write files outside of the uploads directory. This could be used to alter the behavior of the installation through custom theme upload path traversal in LocalStorageBase and theme storage name handling. This issue is fixed in version 6.54.1.","cvssScore":6.6,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:L","cwes":["CWE-22"],"vendors":[],"products":[],"references":[{"url":"https://github.com/TryGhost/Ghost/commit/fbaa92327e52607036a1e42204c9eadcc751d82c","tags":[]},{"url":"https://github.com/TryGhost/Ghost/releases/tag/v6.54.1","tags":[]},{"url":"https://github.com/TryGhost/Ghost/security/advisories/GHSA-cjc9-q5gf-327p","tags":[]}],"exploitRefs":[{"url":"https://github.com/TryGhost/Ghost/commit/fbaa92327e52607036a1e42204c9eadcc751d82c","tags":[]},{"url":"https://github.com/TryGhost/Ghost/releases/tag/v6.54.1","tags":[]},{"url":"https://github.com/TryGhost/Ghost/security/advisories/GHSA-cjc9-q5gf-327p","tags":[]}],"hasPoc":true,"ai":{"summary":"The vulnerability allows a staff user to write files outside the intended directory via custom themes, potentially altering system behavior.","exploitability":"Exploitation requires access as a staff user and knowledge of theme upload path traversal techniques; not trivial but feasible.","blast_radius":"If exploited, could significantly impact system integrity by allowing unauthorized file writes and modifications.","remediation":"Update to Ghost version 6.54.1 or later to address the vulnerability.","tags":["file-write","theme-vuln","custom-theme","content-management"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-08-11T07:05:02.021Z"}}