EUVD-2026-23850Severity by source
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
Primary rating from Vendor (VulnCheck) · only source for this CVE.
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
7DescriptionCVE.org
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. CVSS 8.8 reflects high impact across confidentiality, integrity, and availability. EPSS data not provided; KEV status unknown. Public disclosure via VulnCheck advisory with commit-level fix details increases likelihood of exploitation attempts.
Technical ContextAI
This vulnerability affects Vvveb CMS (cpe:2.3:a:givanz:vvveb), an open-source content management system. The root cause is CWE-915 (Improperly Controlled Modification of Dynamically-Determined Object Attributes), commonly known as mass assignment or parameter binding vulnerability. The admin user profile save endpoint fails to sanitize or whitelist allowed parameters, enabling attackers to inject privileged fields like role_id into HTTP requests. By manipulating this field to role_id=1 (Super Administrator), low-privileged authenticated users bypass role-based access controls. The Super Administrator role grants plugin upload capabilities, which in CMS platforms typically accept ZIP archives containing PHP code that executes server-side, creating a direct path to remote code execution. This represents a classic privilege escalation to RCE attack chain common in web applications with inadequate input validation on mass assignment operations.
RemediationAI
Immediately upgrade Vvveb CMS to version 1.0.8.1 or later, available from the official GitHub release at https://github.com/givanz/Vvveb/releases/tag/1.0.8.1. The patch commit (https://github.com/givanz/Vvveb/commit/0eca14af50f038915b8bf7ceec2becf6b6720b0a) implements parameter whitelisting on the profile save endpoint to prevent role_id injection. If immediate patching is not feasible, implement these specific compensating controls: disable user registration to prevent attacker account creation (limits attack surface to existing compromised accounts); implement Web Application Firewall rules to block POST requests to admin profile endpoints containing 'role_id' parameter (may break legitimate admin workflows); restrict network access to admin interfaces via IP allowlisting or VPN-only access (reduces attack vector from AV:N to AV:A but breaks remote administration); audit existing user accounts for unexpected role escalations by comparing current role assignments against baseline (detection control, not prevention). Each workaround reduces usability-upgrade remains the definitive solution. Full advisory details at https://www.vulncheck.com/advisories/vvveb-privilege-escalation-via-admin-user-save.
An issue in vvveb CMS v.1.0.6 allows a remote attacker to execute arbitrary code via the Plugin mechanism. Rated critica
A vulnerability was found in givanz Vvveb 1.0.5. Rated medium severity (CVSS 5.1), this vulnerability is remotely exploi
Arbitrary File Upload vulnerability in VvvebJs before version 1.7.5, allows unauthenticated remote attackers to execute
Reflected Cross-Site Scripting (XSS) vulnerability in VvvebJs before version 1.7.7, allows remote attackers to execute a
A security flaw has been discovered in givanz Vvveb up to 1.0.7.2. Rated medium severity (CVSS 5.5), this vulnerability
A security vulnerability has been detected in givanz Vvveb 1.0.7.2. Rated medium severity (CVSS 5.3), this vulnerability
Remote code execution in Vvveb CMS v1.0.8 allows authenticated administrators to execute arbitrary system commands as ww
Remote code execution in Vvveb CMS versions prior to 1.0.8.1 allows unauthenticated attackers to inject arbitrary PHP co
Hard-coded credentials in Vvveb's Docker deployment expose the entire application database to unauthenticated remote att
Stored cross-site scripting in Vvveb prior to 1.0.8.1 allows authenticated users with media upload and rename permission
Insecure Direct Object Reference in Vvveb CMS prior to 1.0.8.4 allows any authenticated low-privileged Vendor to read, d
Broken object-level authorization in Vvveb CMS prior to 1.0.8.4 allows an authenticated low-privilege Vendor to access,
Same technique Privilege Escalation
View allShare
External POC / Exploit Code
Leaving vuln.today