CVEvulnerability
CVE-2026-34590
5.4 MEDIUM
Official page ↗
- Status
- Analyzed
- Published
- 2026-04-02
- Last modified
- 2026-07-24
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.4 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- Weaknesses
- CWE-918
Description
Postiz is an AI social media scheduling tool. Prior to version 2.21.4, the POST /webhooks/ endpoint for creating webhooks uses WebhooksDto which validates the url field with only @IsUrl() (format check), missing the @IsSafeWebhookUrl validator that blocks internal/private network addresses. The update (PUT /webhooks/) and test (POST /webhooks/send) endpoints correctly apply @IsSafeWebhookUrl. When a post is published, the orchestrator fetches the stored webhook URL without runtime validation, enabling blind SSRF against internal services. This issue has been patched in version 2.21.4.
Affected configurations
• gitroom postiz (< 2.21.4)
Related
Weakness · CWE (1)
- CWE-918 Server-Side Request Forgery weakness
References
- https://github.com/gitroomhq/postiz-app/commit/5ae4c950db6aa516a31454b7a45b9480bca40a11 Patch
- https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.4 Product, Release Notes
- https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-wc9c-7cv8-m225 Exploit, Mitigation, Vendor Advisory