Backup Backup - Information Disclosure (CVE-2023-6266)

Q: Am I affected by this vulnerability?

You are affected if your site runs Backup Backup. No account is needed to exploit this, so a public site is reachable by anyone.

Q: How do I fix it?

Update Backup Backup to the latest available version. Where the vendor has not yet published a fix, remove or disable the plugin until they do. Until you can update, Restrict REST API in Hack Halt Pro contains this class of attack at the request layer.

Q: What can an attacker actually do?

This is a Information Disclosure flaw. An attacker who exploits it can read data they were never meant to see, which is often the first step in a larger attack.

CVE-2023-6266

Vulnerability CVE-2023-6266 PLUGIN backup-backup HIGH

The Backup Migration plugin for WordPress is vulnerable to unauthorized access of data due to insufficient path and file validation on the BMI_BACKUP case of the handle_downloading function in all versions up to, and including, 1.3.6. This makes it possible for unauthenticated attackers to download back-up files which can contain sensitive information such as user passwords, PII, database credentials, and much more.

CVE-2023-6266

HIGH CVSS 7.5 Published 2024-01-11 Updated 2026-06-17

AI Risk High (82/100) Active Exploit: No strong signal Published Exploit: No public exploit references Priority: P2 Urgent

Severity Band HIGH

CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Components 2

Reference Links 4

AI Risk Engine High (82/100)

Exploitability High

Active Exploitation No strong signal

Published Exploit Status No public exploit references

Threat Timeline

2024-01-11 CVE published and first recorded in the threat feed.
2026-06-17 Record updated with latest vulnerability metadata.
2026-04-09 AI technical context refreshed for mitigation and impact guidance.
Now Monitoring for follow-up changes, linked references, and new related CVEs.

AI Context

Machine-generated threat intelligence

AI Updated 166 days ago

AI enriched 166 days ago (2026-04-09 06:35 UTC)

Technical Summary

Potential Impact

Severity is HIGH (CVSS 7.5). Depending on deployment context, affected components may be exposed to unauthorized actions or data integrity risk.

Exploitability Assessment

Exploitability is assessed as High based on remote code execution potential, low-bar exploit prerequisites.

Primary risk drivers: remote code execution potential, low-bar exploit prerequisites

Mitigation Recommendations

Validate affected product versions, prioritize patching, and monitor references for vendor remediation guidance. If immediate patching is not possible, apply compensating controls and limit exposure of vulnerable surfaces.

Detection & Monitoring

Track authentication anomalies, unexpected file writes, and suspicious plugin API activity around affected components.

Business Impact Lens

Prioritize remediation where affected components process customer data, admin sessions, or Internet-exposed workflows.

Affected Products

Backup Backup PLUGIN · backup-backup Affected range not specified Fixed version not specified

Backup Migration PLUGIN · backup-migration Affected: <= 1.3.6 Fixed version not specified

References

What to do about this

Patch promptly The consequence is significant even where an attacker needs a foothold first.

Fix it

Update Backup Backup to the latest available version.

Where the vendor has not published a fix yet, disable the plugin until they do.

Cannot update today? Restrict REST API in Hack Halt Pro blocks this class of attack before WordPress processes the request.

Require authentication for REST namespaces that do not need to be public, so the API cannot be used to enumerate content and accounts.

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