CVE-2026-27429 BoldThemes CVE debrief

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.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.