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Duplicator <= 1.5.17 and Duplicator Pro <= 4.6.10 — Unauthenticated PHP Object Injection

CVE-2026-82814Published · Updated

Action summary

Duplicator – Backups & Migration Plugin – Cloud Backups, Scheduled Backups, & More: Affected: ≤1.5.17Update to 5.0.0 or newer

Duplicator Pro: Affected: ≤4.6.10Update to 5.0.0 or newer

All remediation steps

1M+ active installs

Watch plugin
Severity
High8.8
CVSS
8.8
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:R User interaction
Required
S:U Scope
Unchanged
C:H Confidentiality
High
I:H Integrity
High
A:H Availability
High
Weakness
CWE-502 PHP Object Injection
Required access
No account needed
Exploit prediction (EPSS)
0.7% chance in 30 days54th percentile
CISA KEV
Not listed
On this page8

Am I affected?

Duplicator – Backups & Migration Plugin – Cloud Backups, Scheduled Backups, & More duplicator

  1. Affected≤ 1.5.17
  2. Patched in5.0.0
  3. Latest5.1.1

Update to 5.0.0 or newer.

You are affected if you run ≤ 1.5.17. Version 5.0.0 and later are not affected by this issue.

Duplicator Pro duplicator-pro

  1. Affected≤ 4.6.10
  2. Patched in5.0.0

Update to 5.0.0 or newer.

You are affected if you run ≤ 4.6.10. Version 5.0.0 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Duplicator – Backups & Migration Plugin – Cloud Backups, Scheduled Backups, & More.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 5.0.0, or a newer patched version
  2. Update to version 5.0.0, or a newer patched version
  3. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  4. Watch Duplicator – Backups & Migration Plugin – Cloud Backups, Scheduled Backups, & More to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Alex Thomas, Wordfence Argus.

The Duplicator and Duplicator Pro plugins for WordPress are vulnerable to PHP Object Injection in all versions up to, and including, 1.5.17 and 4.6.10, respectively, via deserialization of untrusted database content in DUPX_UpdateEngine::unserializeTest() during migration. This allows unauthenticated attackers to store a serialized object in public site content before an administrator builds a package and later performs a migration or import that runs database search-and-replace. Duplicator Free bundles a Requests 1.7 POP chain that permits attacker-selected callbacks, resulting in direct operating-system command execution. Duplicator Pro bundles an IndexList destructor gadget that permits deletion of an attacker-selected existing file when its containing directory is writable by the installer PHP process; deletion of wp-config.php can expose the setup wizard and lead to site takeover and code execution if the attacker reaches it first and supplies a reachable database they control. The package must be created after the carrier is stored, and a later administrator migration action is required.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Duplicator – Backups & Migration Plugin – Cloud Backups, Scheduled Backups, & More

All 20
More vulnerabilities in Duplicator – Backups & Migration Plugin – Cloud Backups, Scheduled Backups, & More
SeverityVulnerabilityCVEPublished
Medium5.3Unauthenticated Full Path Disclosure
<5.1.0Update to 5.1.0
CVE-2026-112244
Medium6.5Authenticated (Subscriber+) SQL Injection
<5.1.0Update to 5.1.0
CVE-2026-115262
Medium6.1Reflected Cross-Site Scripting
<5.1.0Update to 5.1.0
CVE-2026-112243
High7.2Authenticated (Multisite Subsite Admin+) Arbitrary Code Execution
≤1.5.17Update to 5.0.0
CVE-2026-115251
Medium5.3Full Path Disclosure
≤1.5.9Update to 1.5.10
CVE-2024-6210

Same weakness (PHP Object Injection)

All PHP Object Injection
Other PHP Object Injection vulnerabilities
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup≤5.25.25Update to 5.26.45
CVE-2026-120688
Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder≤1.0.2Update to 1.1
CVE-2026-125055
Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System≤3.3.9Update to 3.4.0
CVE-2026-119077
Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce≤5.127.0Update to 5.128.0
CVE-2026-121518

Timeline

  1. CVE published

    Severity high, CVSS 8.8

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
CVE® identifiers
[object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
EPSS
Exploit Prediction Scoring System by FIRST.org.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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