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Vulnerability record · CVE-2026-21433 · published 2 January 2026

CVE-2026-21433: Emlog server-side request forgery (ssrf) vulnerability

Emlog · Emlog

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.

7.7 CVSS 3.1 High EPSS 0.31% · top 78.3% CWE-918 · Server-side request forgery (SSRF)
7.7CVSS 3.1 base score
0.31%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References, 1 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/emlog/emlog/security/advisories/GHSA-6rwr-c8hc-mjj4 ExploitVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2025-29401Emlog code injection vulnerabilityAn arbitrary file upload vulnerability in the component /views/plugin.php of emlog pro v2.5.7 allows attackers to execute arbitrary code via uploadin…EPSS 0.77%9.8CVE-2025-25783Emlog unrestricted file upload vulnerabilityAn arbitrary file upload vulnerability in the component admin\plugin.php of Emlog Pro v2.5.3 allows attackers to execute arbitrary code via uploading…EPSS 0.71%9.8CVE-2023-44973Emlog unrestricted file upload vulnerabilityAn arbitrary file upload vulnerability in the component /content/templates/ of Emlog Pro v2.2.0 allows attackers to execute arbitrary code via upload…EPSS 1.0%9.8CVE-2023-44974Emlog unrestricted file upload vulnerabilityAn arbitrary file upload vulnerability in the component /admin/plugin.php of Emlog Pro v2.2.0 allows attackers to execute arbitrary code via uploadin…EPSS 19%9.8CVE-2023-43291Emlog deserialization of untrusted data vulnerabilityDeserialization of Untrusted Data in emlog pro v.2.1.15 and earlier allows a remote attacker to execute arbitrary code via the cache.php component.EPSS 1.6%9.8CVE-2022-23379Emlog sql injection vulnerabilityEmlog v6.0 was discovered to contain a SQL injection vulnerability via the $TagID parameter of getblogidsfromtagid().EPSS 1.4%9.8CVE-2021-40883Emlog unrestricted file upload vulnerabilityA Remote Code Execution (RCE) vulnerability exists in emlog 5.3.1 via content/plugins.EPSS 3.0%9.8CVE-2021-31737Emlog unrestricted file upload vulnerabilityemlog v5.3.1 and emlog v6.0.0 have a Remote Code Execution vulnerability due to upload of database backup file in admin/data.php.EPSS 3.9%

Source: NIST National Vulnerability Database (record CVE-2026-21433), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.