Emlog vulnerable to Server-Side Request Forgery (SSRF)
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-21433
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 19:23 UTC · Revision 1
Source evidence
Emlog vulnerable to Server-Side Request Forgery (SSRF)
core-osv · Original sourcePublished 2 Jan 2026, 19:00 UTC
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.
osv:CVE-2026-21433
Complete source record
{
"id": "4f8aa8f28e33cea9380a73ca4c0621eae640bfa1f9819e0e90f7393e0197fff8",
"url": "https://osv.dev/vulnerability/CVE-2026-21433",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Emlog vulnerable to Server-Side Request Forgery (SSRF)",
"summary": "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.",
"evidence": "osv:CVE-2026-21433",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-21433",
"aliases": [
"CVE-2026-21433",
"GHSA-6rwr-c8hc-mjj4"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/emlog/emlog",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "4c6745bec558ff11e7a83e69b1d2441d8840802f"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"last_affected": "2.5.19"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"cpe": "cpe:2.3:a:emlog:emlog:*:*:*:*:pro:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "2.5.19"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"pro-2.5.19",
"pro-2.5.18",
"pro-2.5.17",
"pro-2.5.16",
"pro-2.5.15",
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"pro-2.3.9",
"pro-2.3.8",
"pro-2.3.7",
"pro-2.3.6",
"pro-2.3.5",
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"pro-test-02",
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"pro-2.1.13",
"pro-2.1.12",
"ci",
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"pro-2.1.10",
"pro-2.1.9",
"pro-2.1.8",
"pro-2.1.7",
"pro-2.1.6",
"pro-2.1.5",
"pro-2.1.4",
"pro-2.1.3",
"pro-2.1.2",
"pro-2.1.1",
"pro-2.1.0",
"pro-2.0.3",
"pro-2.0.2",
"pro-2.0.1",
"pro-2.0.0",
"pro-1.9.3",
"pro-1.9.2",
"pro-1.9.1",
"pro-1.9.0",
"pro-1.8.0",
"pro-1.7.1",
"pro-1.7.0",
"pro-1.6.0",
"pro-1.5.1",
"pro-1.5.0.new",
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"pro-1.0.5",
"pro-1.0.4",
"pro-1.0.3",
"pro-1.0.2",
"pro-1.0.1",
"6.1.0",
"6.0.0",
"5.3.1",
"emlog_5.3.0",
"emlog_5.2.1",
"emlog_5.2.0",
"emlog_5.1.2"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21433.json"
}
}
],
"modified": "2026-10-28T02:30:22.979053189Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21433.json",
"https://github.com/emlog/emlog/security/advisories/GHSA-6rwr-c8hc-mjj4",
"https://nvd.nist.gov/vuln/detail/CVE-2026-21433"
],
"provider_metadata": {
"cwe_ids": [
"CWE-918"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21433.json"
}
},
"related_cves": [
{
"value": "CVE-2026-21433",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 489107,
"published_at": "2026-01-02T19:00:22.611+00:00"
}