How to fix CVE-2026-34427?

Within 24 hours: Identify all Vvveb CMS deployments and document current versions. Within 7 days: Upgrade all instances to Vvveb CMS version 1.0.8.1 or later. Within 30 days: Conduct access log review for versions prior to 1.0.8.1 to identify any unauthorized privilege escalation or plugin uploads; reset credentials for all low-privileged accounts that accessed the system during the exposure window.

Is Vvveb affected by CVE-2026-34427?

Vvveb CMS versions before 1.0.8.1 contain a privilege escalation vulnerability that allows authenticated low-privileged users to gain Super Administrator access and upload malicious plugins, enabling complete system compromise.

Vvveb CVE-2026-34427

EUVD-2026-23850 HIGH

Improperly Controlled Modification of Dynamically-Determined Object Attributes (CWE-915)

2026-04-20 VulnCheck

Privilege Escalation RCE

8.7

CVSS 4.0

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/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

Lifecycle Timeline

Re-analysis Queued

Apr 20, 2026 - 16:22 vuln.today

cvss_changed

CVSS changed

Apr 20, 2026 - 16:22 NVD

8.8 (HIGH) 8.7 (HIGH)

Analysis Generated

Apr 20, 2026 - 15:04 vuln.today

DescriptionNVD

Vvveb prior to 1.0.8.1 contains a privilege escalation vulnerability in the admin user profile save endpoint that allows authenticated users to modify privileged fields on their own profile. Attackers can inject role_id=1 into profile save requests to escalate to Super Administrator privileges, enabling plugin upload functionality for remote code execution.

AnalysisAI

Privilege escalation in Vvveb CMS versions prior to 1.0.8.1 allows authenticated low-privileged users to inject role_id=1 into profile save requests, escalating to Super Administrator and enabling plugin upload for remote code execution. Vendor patch available in version 1.0.8.1. …

RemediationAI

Within 24 hours: Identify all Vvveb CMS deployments and document current versions. Within 7 days: Upgrade all instances to Vvveb CMS version 1.0.8.1 or later. …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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CVE-2026-34427 vulnerability details – vuln.today

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Vvveb CVE-2026-34427

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

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RemediationAI

Analysis

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Vvveb CVE-2026-34427

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

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External POC / Exploit Code