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CVE-2026-27429 BoldThemes CVE debrief

CVE-2026-27429 is a critical vulnerability in the Nifty theme for WordPress, allowing unauthenticated PHP object injection. It has a CVSS score of 9.8 and was published on June 17, 2026. The vulnerability affects Nifty versions up to 1.4.1. Successful exploitation could lead to high impact on confidentiality, integrity, and availability. Administrators of affected systems should apply patches or mitigations as soon as possible. The CVE record and NVD detail provide further information on this vulnerability.

Vendor
BoldThemes
Product
Nifty
CVSS
CRITICAL 9.8
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

Administrators and users of the Nifty theme for WordPress, especially those using versions up to 1.4.1, should be aware of this critical vulnerability. Applying patches or mitigations is crucial to prevent potential exploitation.

Technical summary

CVE-2026-27429 is an unauthenticated PHP object injection vulnerability in the Nifty theme for WordPress, affecting versions up to 1.4.1. The vulnerability has a CVSS score of 9.8, indicating critical severity. It allows attackers to inject PHP objects without authentication, potentially leading to high impact on confidentiality, integrity, and availability. The vulnerability is tracked under CWE-502.

Defensive priority

high

Recommended defensive actions

  • Apply patches or updates to Nifty theme version 1.4.1 or later
  • Use a Web Application Firewall (WAF) to detect and prevent exploitation attempts
  • Monitor systems for suspicious activity
  • Restrict access to sensitive areas of the WordPress site
  • Regularly update and patch WordPress and its themes
  • Consider using security plugins for WordPress
  • Review and harden WordPress site configurations

Evidence notes

The information provided is based on data from official sources, including CVE.org and the National Vulnerability Database (NVD). The CVE record and NVD detail provide further information on this vulnerability. Additional details are available from Patchstack, which reported the vulnerability.

Official resources

public