CVE-2026-78153 Restrict User Access CVE debrief

Who should care

WordPress administrators and users of the Restrict User Access plugin should be aware of this vulnerability and take necessary actions to protect their sites. It is essential for operators, platform administrators, and security teams to review the affected product deployments and assess the potential operational impact. They should also verify the version of the plugin and update to 2.8.1 or later if necessary.

Technical summary

The Restrict User Access WordPress plugin before 2.8.1 is vulnerable to unauthorized access, allowing unauthenticated users to bypass content protection and read restricted content and enumerate users. This vulnerability has a CVSS score of 5.3 and is classified as MEDIUM severity. The vulnerability is caused by the plugin's failure to normalize the REST API route before checking it against the routes its content protection covers.

Defensive priority

Medium priority due to the CVSS score of 5.3 and the potential for unauthorized access to restricted content.

Recommended defensive actions

• Verify the version of the Restrict User Access WordPress plugin and update to 2.8.1 or later if necessary.
• Review and restrict access to sensitive content and user enumeration.
• Monitor for potential unauthorized access attempts.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The evidence for this vulnerability is based on the NVD vulnerability detail and a source reference from WPScan. Further verification is recommended to confirm the vulnerability's existence and impact. It is essential to review the official CVE record and NVD detail page for accurate information. Additionally, defenders should verify the affected product deployments in managed environments and assess the potential operational impact.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.