CVE-2026-34590

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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.21.4)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "postiz-app", "source": "cna", "vendor": "gitroomhq"}, "product": "postiz-app", "vendor": "gitroomhq"}], "analysis": {"en": {"generated_at": "2026-04-07T23:30:09.840807+00:00", "value": {"mitigation_remediation": ["Upgrade Postiz to version 2.21.4 or later"], "summary": {"action": "Apply Patch", "impact": "Server\u2011Side Request Forgery (SSRF) allowing internal network exposure"}, "threat_synthesis": {"affected_systems": "The affected product is Postiz, an AI\u2011powered social media scheduling platform from Gitroom HQ. Versions older than 2.21.4 contain the vulnerable endpoint; the update to v2.21.4 adds the necessary @IsSafeWebhookUrl validator to prevent this SSRF.", "description_and_impact": "The vulnerability arises because the /webhooks/ creation endpoint relies on only format validation for the URL field, omitting the safety check that blocks internal or private network addresses. As a result, when a post is published the orchestrator retrieves the configured webhook URL without any runtime safety validation, enabling a blind SSRF attack that can target internal services. The flaw could allow an attacker to read or influence internal network resources by crafting a malicious webhook URL.", "risk_and_exploitability": "The CVSS score of 5.4 indicates medium severity, while the EPSS score below 1% suggests a low likelihood of exploitation. The vulnerability is not listed in CISA\u2019s KEV catalog. A likely exploitation path involves creating a malicious webhook via the approved POST /webhooks/ endpoint, which the orchestrator later fetches blindly when a post is published, enabling internal network access."}}}}, "created": "2026-04-03T07:32:15.084518+00:00", "updated": "2026-04-08T19:55:28.291735+00:00", "vendors": ["gitroomhq", "gitroomhq$PRODUCT$postiz-app"]}