CVE-2026-21433

HighCVSS 7.7/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 7.7/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Weakness enumeration

CWE-918

Affected software

Vendor	Product	Versions
emlog	emlog	<= 2.5.19

References

https://github.com/emlog/emlog/security/advisories/GHSA-6rwr-c8hc-mjj4Exploit, Vendor Advisory

Timeline

Published: Jan 2, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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