CVE-2026-21433
HIGHCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Lifecycle Timeline
3Description
Emlog is an open source website building system. Versions up to and including 2.5.19 are vulnerable to server-side Out-of-Band (OOB) requests / SSRF via uploaded SVG files. An attacker can upload a crafted SVG to http[:]//emblog/admin/media[.]php which contains external resource references. When the server processes/renders the SVG (thumbnailing, preview, or sanitization), it issues an HTTP request to the attacker-controlled host. Impact: server-side SSRF/OOB leading to internal network probing and potential metadata/credential exposure. As of time of publication, no known patched versions are available.
Analysis
Server-side request forgery (SSRF) in Emlog up to version 2.5.19 allows authenticated attackers to make arbitrary HTTP requests by uploading malicious SVG files to the media upload endpoint, enabling internal network reconnaissance and potential credential exposure when the server processes the files. Public exploit code exists for this vulnerability and no patches are currently available. …
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Remediation
Within 7 days: Identify all affected systems and apply vendor patches promptly. Implement egress filtering and URL validation for server-side requests.
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External POC / Exploit Code
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