CVE-2026-21433
highpriority · track · 0EPSS 0.003 · 25 %ileEUUSEPSS · scored 2026-10-28
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
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affected products (2)
Products and version ranges known to be affected.
also known as (2)
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sources
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references (5)
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/cve-2026-21433cnnvd
- https://github.com/emlog/emlog/releasesPatchcnnvd
- https://github.com/emlog/emlog/security/advisories/GHSA-6rwr-c8hc-mjj4cnnvd
- https://github.com/emlog/emlog/security/advisories/GHSA-6rwr-c8hc-mjj4enisa_euvd
- https://github.com/emlog/emlog/security/advisories/GHSA-6rwr-c8hc-mjj4ExploitVendor Advisorynvd
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