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High severity7.7OSV Advisory· Published Jan 2, 2026· Updated Jun 17, 2026

CVE-2026-21433

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

3
  • Emlog/EmlogOSV3 versions
    5.3.1, 6.0.0, 6.1.0, …+ 2 more
    • (no CPE)range: 5.3.1, 6.0.0, 6.1.0, …
    • cpe:2.3:a:emlog:emlog:*:*:*:*:pro:*:*:*range: <=2.5.19
    • (no CPE)range: <=2.5.19

Patches

Vulnerability mechanics

References

1

News mentions

0

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