{"id":"GHSA-vj2p-7pgw-g2wf","summary":"Postiz App has a High-Severity SSRF Vulnerability via Next.js","details":"### Impact\nA successful SSRF attack allows an attacker to:\n- Bypass firewalls to scan and interact with internal network services/ports.\n- Access sensitive cloud metadata services (e.g., AWS IMDS 169.254.169.254) to potentially leak instance credentials.\n- Pivot into the internal network environment where Postiz is hosted.\n\n### Workarounds\nThere are no workarounds known to this, please upgrade to Postiz version `v2.21.1`.","modified":"2026-03-27T16:04:59.024811Z","published":"2026-03-27T15:46:53Z","database_specific":{"github_reviewed_at":"2026-03-27T15:46:53Z","nvd_published_at":null,"cwe_ids":["CWE-1395","CWE-918"],"severity":"HIGH","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-vj2p-7pgw-g2wf"},{"type":"WEB","url":"https://github.com/vercel/next.js/security/advisories/GHSA-fr5h-rqp8-mj6g"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-34351"},{"type":"PACKAGE","url":"https://github.com/gitroomhq/postiz-app"}],"affected":[{"package":{"name":"postiz","ecosystem":"npm","purl":"pkg:npm/postiz"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"2.0.12"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-vj2p-7pgw-g2wf/GHSA-vj2p-7pgw-g2wf.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}