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CVE-2026-39556 Elated-Themes CVE debrief

CVE-2026-39556 is a HIGH severity vulnerability (CVSS Score: 8.1) in the Konsept theme, affecting versions up to 1.9. This Unauthenticated PHP Object Injection vulnerability allows attackers to inject malicious PHP objects without authentication, potentially leading to code execution, data breaches, or system compromise. The vulnerability was published on June 17, 2026, and immediately gained attention due to its high severity and potential impact. Users of the affected Konsept theme versions should take immediate action to mitigate this vulnerability. The CVE record and NVD details provide further information on this vulnerability.

Vendor
Elated-Themes
Product
Konsept
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

Administrators and users of the Konsept theme versions up to 1.9 should be aware of this vulnerability and take necessary actions to secure their installations. This includes updating to a patched version if available and implementing additional security measures to prevent exploitation.

Technical summary

CVE-2026-39556 is an Unauthenticated PHP Object Injection vulnerability in the Konsept theme, affecting versions up to 1.9. The vulnerability has a CVSS Score of 8.1, indicating high severity. The Common Vulnerability Scoring System (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 (AV:N) without authentication (PR:N) and can lead to high impact on confidentiality (C:H), integrity (I:H), and availability (A:H). The weakness associated with this vulnerability is CWE-502, 'Deserialization of Untrusted Data'.

Defensive priority

High

Recommended defensive actions

  • Update the Konsept theme to a version that is not vulnerable (if available).
  • Implement a Web Application Firewall (WAF) to detect and prevent exploitation attempts.
  • Monitor the system for suspicious activity and implement logging and auditing.
  • Restrict access to the Konsept theme's administrative interface.
  • Use secure protocols for data transmission and storage.
  • Regularly update and patch the system and its components.
  • Consider using a vulnerability scanning tool to identify potential vulnerabilities.

Evidence notes

The information provided is based on data from official sources, including the CVE record and NVD details. The CVE record was published on June 17, 2026, and the vulnerability has a CVSS Score of 8.1. The weakness associated with this vulnerability is CWE-502. The vendor and product information is not fully confirmed, with the vendor name listed as 'Unknown Vendor'.

Official resources

public