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PatchSiren cyber security CVE debrief

CVE-2026-39580 Select-Themes CVE debrief

CVE-2026-39580 is a high-severity vulnerability in the Micdrop theme for WordPress, affecting versions up to and including 1.3.1. The vulnerability allows unauthenticated attackers to inject PHP objects, potentially leading to code execution, data breaches, or other malicious activities. With a CVSS score of 8.1, this vulnerability is considered high-risk and requires immediate attention. Administrators of affected systems should take prompt action to mitigate the risk. The vulnerability was made public on June 17, 2026.

Vendor
Select-Themes
Product
Micdrop
CVSS
HIGH 8.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-17
Original CVE updated
2026-06-17
Advisory published
2026-06-17
Advisory updated
2026-06-17

Who should care

WordPress administrators using the Micdrop theme version 1.3.1 or earlier should be aware of this vulnerability and take immediate action to protect their systems. Security teams and IT professionals responsible for managing WordPress installations are also advised to review and address this vulnerability.

Technical summary

The CVE-2026-39580 vulnerability is caused by an unauthenticated PHP object injection weakness in the Micdrop theme. This allows attackers to inject malicious PHP objects, potentially leading to arbitrary code execution, data tampering, or other security breaches. The vulnerability has a CVSS score of 8.1, indicating high severity. The CVSS vector is CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H, indicating that the vulnerability can be exploited over the network with high attack complexity and without requiring user interaction or privileges.

Defensive priority

High

Recommended defensive actions

  • Update the Micdrop theme to the latest version, if available.
  • Restrict access to the affected systems and monitor for suspicious activity.
  • Implement additional security measures, such as web application firewalls (WAFs) and intrusion detection systems (IDS).
  • Conduct regular security audits and vulnerability assessments.
  • Consider disabling the Micdrop theme until an updated version is released.
  • Review and update incident response plans to address potential exploitation of this vulnerability.

Evidence notes

The information provided is based on data from the National Vulnerability Database (NVD) and Patchstack. The CVE record and NVD detail pages provide additional information about the vulnerability.

Official resources

CVE-2026-39580 was made public on June 17, 2026.