CVE-2026-39577
Deferred Deferred - Pending Action
Unauthenticated PHP Object Injection in Playroom

Publication date: 2026-06-17

Last updated on: 2026-06-17

Assigner: Patchstack

Description
Unauthenticated PHP Object Injection in Playroom <= 1.4.1 versions.
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Meta Information
Published
2026-06-17
Last Modified
2026-06-17
Generated
2026-06-17
AI Q&A
2026-06-17
EPSS Evaluated
N/A
NVD
CVE-2026-39577
EUVD
EUVD-2026-37482
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
patchstack playroom to 1.5 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-502 The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
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Executive Summary

CVE-2026-39577 is a PHP Object Injection vulnerability found in the WordPress Playroom Theme versions 1.4.1 and below. This vulnerability allows unauthenticated attackers to inject malicious PHP objects, potentially leading to code execution, SQL injection, path traversal, denial of service, and other harmful actions if a suitable POP chain exists.

Impact Analysis

This vulnerability can have severe impacts including unauthorized code execution, data breaches through SQL injection, unauthorized file access via path traversal, and service disruption through denial of service attacks. Because it requires no authentication, attackers can exploit it remotely, potentially affecting thousands of websites using the vulnerable theme.

Mitigation Strategies

Immediate action is required to mitigate the risk of this PHP Object Injection vulnerability in Playroom versions 1.4.1 and below.

  • Update the Playroom theme to version 1.5 or later.
  • Apply the mitigation rule provided by Patchstack to block attacks until the update is applied.
Compliance Impact

The provided information does not specify how this vulnerability directly affects compliance with common standards and regulations such as GDPR or HIPAA.

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