Access Control Bypass in Restrict User Access Plugin by WordPress
CVE-2026-78153

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
Restrict User Access
Vendor
CVE Published:
2 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-78153?

The Restrict User Access plugin for WordPress prior to version 2.8.1 is susceptible to an access control bypass vulnerability due to insufficient normalization of the REST API routes. This oversight permits unauthorized users to circumvent content protection measures, granting them the ability to access restricted content and enumerate registered users on the site. Such vulnerabilities present significant risks, potentially leading to sensitive data exposure and privacy breaches.

Affected Version(s)

Restrict User Access 2.6 < 2.8.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-78153 - Proof of Concept

References

https://wpscan.com/vulnerability/d17c00fc-002a-4f5f-9255-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Shivamani Vastrala
WPScan
.