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Vvveb EUVD-2026-23852

| CVE-2026-34428 HIGH
Server-Side Request Forgery (SSRF) (CWE-918)
2026-04-20 VulnCheck
8.3
CVSS 4.0 · NVD
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Severity by source

NVD PRIMARY
8.3 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

7
Re-analysis Queued
Apr 20, 2026 - 16:22 vuln.today
cvss_changed
CVSS changed
Apr 20, 2026 - 16:22 NVD
7.7 (HIGH) 8.3 (HIGH)
Analysis Generated
Apr 20, 2026 - 15:04 vuln.today
EUVD ID Assigned
Apr 20, 2026 - 14:45 euvd
EUVD-2026-23852
Analysis Generated
Apr 20, 2026 - 14:45 vuln.today
Patch released
Apr 20, 2026 - 14:45 nvd
Patch available
CVE Published
Apr 20, 2026 - 13:55 nvd
HIGH 8.3

DescriptionCVE.org

Vvveb prior to 1.0.8.1 contains a server-side request forgery vulnerability in the oEmbedProxy action of the editor/editor module where the url parameter is passed directly to getUrl() via curl without scheme or destination validation. Authenticated backend users can supply file:// URLs to read arbitrary files readable by the web server process or http:// URLs targeting internal network addresses to probe internal services, with response bodies returned directly to the caller.

AnalysisAI

Server-Side Request Forgery in Vvveb CMS versions prior to 1.0.8.1 allows authenticated backend users to read arbitrary local files via file:// URLs or probe internal network services via http:// URLs through the oEmbedProxy action's unvalidated url parameter. The vulnerability (CWE-918) enables information disclosure from the web server's filesystem and internal network reconnaissance. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain backend credentials
Delivery
Authenticate to Vvveb CMS
Exploit
Access editor module
Execution
Craft oEmbedProxy request with file:// or internal http:// URL
Persist
Extract sensitive data from response
Impact
Pivot to internal resources or cloud infrastructure

Vulnerability AssessmentAI

Exploitation Requires authenticated access to Vvveb backend with privileges to use the editor module's oEmbedProxy action - specifically, the user account must have permission to access editor/editor endpoints. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 7.7 (High) with vector AV:N/AC:L/PR:L/UI:N/S:C indicates network-exploitable attack requiring low-privilege authentication with no user interaction and scope change (internal network access beyond vulnerable component). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with valid backend credentials (potentially obtained via phishing, credential stuffing, or separate authentication bypass) logs into the Vvveb CMS administrator panel. Within the editor module, they craft a malicious oEmbedProxy request with url=file:///etc/passwd to read the server's password file, confirming local file access. …
Remediation Upgrade immediately to Vvveb 1.0.8.1 or later, which addresses the SSRF vulnerability through URL scheme validation (patch commit: https://github.com/givanz/Vvveb/commit/2d356844f37819bf771e7cd5e12a8686975e0b2b). … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Identify all systems running Vvveb CMS and document current version numbers. …

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EUVD-2026-23852 vulnerability details – vuln.today

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