CVE-2026-21433

HIGH

7.7

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.

CVE Details

CVSS v3.1 Score7.7

SeverityHIGH

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published1/2/2026

Last Modified1/16/2026

Sourcenvd

Honeypot Sightings0

Affected Products

emlog:emlog

Weaknesses (CWE)

CWE-918

References

https://github.com/emlog/emlog/security/advisories/GHSA-6rwr-c8hc-mjj4(security-advisories@github.com)

IOC Correlations

No correlations recorded

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