Emlog
CVE-2026-21433
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessAuthenticate to Emlog admin panel
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DeliveryUpload crafted SVG with external resource references
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ExploitServer processes SVG file
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ExecutionIssues SSRF request to attacker-controlled host
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ImpactProbe internal network resources
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V4 - API and Web Service URL allowlisting, SSRF prevention
MITRE ATT&CK
2 techniques across 2 tactics: Initial Access, Credential Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Emlog versions up to 2.5.19 with SVG upload functionality in admin/media.php accessible to authenticated users. Requires valid admin credentials (PR:L) and SVG processing enabled during thumbnail generation, preview rendering, or sanitization routines. |
| Impact | CVSS 7.7 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: Low. User interaction: None. Exploitation requires authentication. Exploitable via remote/network. Public exploit/POC available. |
| Exploit ScenarioDerived | A remote attacker (requires authentication) could exploit this flaw, internal network probing and potential metadata/credential e. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Server-side request forgery (SSRF) in Emlog up to version 2.5.19 allows authenticated attackers to make arbitrary HTTP requests by uploading malicious SVG files to the media upload endpoint, enabling internal network reconnaissance and potential credential exposure when the server processes the files. Public exploit code exists for this vulnerability and no patches are currently available. The flaw affects all Emlog installations accepting SVG uploads and can be exploited without user interaction once an attacker gains authenticated access.
Earlier versions of this analysis (1)
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. [CVSS 7.7 HIGH]
RemediationAI
Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Classified as CWE-918 (Server-Side Request Forgery (SSRF)). Affects 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
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
Lifecycle Timeline
2DescriptionGitHub Advisory
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.
Executive ViewAI
Organizations using Emlog face notable risk from CVE-2026-21433, a server-side request forgery vulnerability rated CVSS 7.7. Attackers could trick authenticated users into performing unintended actions, potentially modifying critical settings or data. Proof-of-concept code is publicly available, increasing the risk of exploitation. Organizations should apply vendor updates when available and consider compensating controls in the interim.
Apply vendor patch. If immediate patching is not feasible: (1) Implement strict egress filtering; (2) Use allowlists for outbound connections; (3) Block access to cloud metadata endpoints.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Server-Side Request Forgery exploits applications that fetch remote resources based on user-supplied URLs.
Affected Products (CPE)GitHub Advisory
An arbitrary file upload vulnerability in the component /views/plugin.php of emlog pro v2.5.7 allows attackers to execut
An arbitrary file upload vulnerability in the component /admin/plugin.php of Emlog Pro v2.2.0 allows attackers to execut
An arbitrary file upload vulnerability in the component /content/templates/ of Emlog Pro v2.2.0 allows attackers to exec
Deserialization of Untrusted Data in emlog pro v.2.1.15 and earlier allows a remote attacker to execute arbitrary code v
A Remote Code Execution (RCE) vulnerability exists in emlog 5.3.1 via content/plugins. Rated critical severity (CVSS 9.8
emlog v5.3.1 and emlog v6.0.0 have a Remote Code Execution vulnerability due to upload of database backup file in admin/
emlog through 6.0.0beta has an arbitrary file deletion vulnerability via an admin/data.php?action=dell_all_bak request w
Emlog Pro 2.5.20 has an arbitrary file deletion vulnerability. This vulnerability stems from the admin/template.php comp
Emlog 2.5.23 is vulnerable to CSRF in article creation, which chains with stored XSS to achieve account takeover. An att
Remote code execution in Emlog v2.6.1 and earlier allows authenticated attackers to upload arbitrary files through an in
Cross-site request forgery in Emlog Pro 2.5.19 and earlier can lead to account takeover of a privileged administrator be
An issue was discovered in emlog 6.0.0stable. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable
Exploit-DB