CVE-2026-34427: Vvveb < 1.0.8.1 Privilege Escalation via admin/user/save

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-20 · updated 2026-10-26
Weakness: CWE-915

Description

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.

Affected products

givanz Vvveb: before 1.0.8.1 — fixed in 1.0.8.1

How to fix

Upgrade to a fixed version: givanz Vvveb 1.0.8.1. Check the vendor advisory for mitigations.

References

https://github.com/givanz/Vvveb/commit/0eca14af50f038915b8bf7ceec2becf6b6720b0a
https://github.com/givanz/Vvveb/releases/tag/1.0.8.1
https://www.vulncheck.com/advisories/vvveb-privilege-escalation-via-admin-user-save

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