CVE-2026-4029
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe Database Backup for WordPress plugin for WordPress is vulnerable to unauthorized database export in all versions up to, and including, 2.5.2. This is due to the plugin not properly enforcing the return value of its authorization check. This makes it possible for unauthenticated attackers to export database tables, leading to Sensitive Information Exposure. Note: This vulnerability is only exploitable in WordPress Multisite environments where the deprecated is_site_admin() function exists.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThe Database Backup for WordPress plugin fails to properly enforce authorization checks, allowing unauthenticated attackers to export entire database tables in WordPress Multisite environments. The vulnerability stems from the plugin not correctly validating the return value of authorization logic, enabling sensitive data exposure through unauthorized database exports.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Confirm WordPress Multisite installationCheck your WordPress configuration by looking for the multisite definition in wp-config.php (look for 'MULTISITE' constant set to true) or check the Sites menu in the network admin dashboardAffected if The site is NOT a Multisite installation (this vulnerability only affects Multisite environments)
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Locate the Database Backup pluginNavigate to Plugins > Installed Plugins in the WordPress admin and look for 'Database Backup' or check the wp-content/plugins directory for a folder containing 'database-backup' or similarAffected if The Database Backup plugin is not installed
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Identify the installed plugin versionIn the WordPress admin Plugins list, click on the Database Backup plugin to view its details, or open the main plugin PHP file (usually database-backup.php or similar) and look for the 'Version' header in the plugin commentsAffected if Version is 2.5.3 or later (the fix was released in version 2.5.3)
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Verify plugin is active on the networkIn Multisite, go to Network Admin > Plugins and confirm the Database Backup plugin is network-activated, or check if the plugin is enabled on the main siteAffected if The plugin is not network-activated or enabled
You are affected if you are running a WordPress Multisite installation with the Database Backup plugin installed, active, and version is below 2.5.3
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpgrade to version 2.5.3 or later. For immediate mitigation, disable the Database Backup plugin on Multisite installations until a patch can be applied, or add web application firewall rules to block unauthorized database export endpoints.
- Consultation3.0 h
- Implementation2.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-4029 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-4029 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data