Unrated severityOSV Advisory· Published Jan 2, 2026· Updated Jan 5, 2026
Emlog vulnerable to Server-Side Request Forgery (SSRF)
CVE-2026-21433
Description
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.
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Affected products
2Patches
Vulnerability mechanics
References
1- github.com/emlog/emlog/security/advisories/GHSA-6rwr-c8hc-mjj4mitrex_refsource_CONFIRM
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