Arbitrary File Upload Vulnerability in AP Background Plugin for WordPress
CVE-2025-9561

8.8HIGH

Key Information:

Vendor

WordPress
Status
Ap Background
Vendor
CVE Published:
3 October 2025

What is CVE-2025-9561?

The AP Background plugin for WordPress has a security vulnerability that allows authenticated users with Subscriber-level access and higher to upload arbitrary files due to inadequate authorization and file validation in the advParallaxBackAdminSaveSlider() function. This flaw can lead to potential remote code execution on the affected server, posing severe risks to site integrity and data security.

Affected Version(s)

AP Background 3.8.1 <= 3.8.2

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://wordpress.org/plugins/ap-background/
https://plugins.trac.wordpress.org/browser/ap-background/...

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Kenneth Dunn
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CVE-2025-9561 : Arbitrary File Upload Vulnerability in AP Background Plugin for WordPress