Isolate WooCommerce Sites Using Payever Plugin Versions 4.8.2 or Older
The National Vulnerability Database rates CVE-2026-42716 as critical, noting that attackers can inject PHP objects without authentication into affected stores.
Key points
- The flaw allows unauthenticated PHP object injection in Payever WooCommerce Gateway versions up to 4.8.2.
- The National Vulnerability Database assigns a CVSS score of 9.8, classifying the vulnerability as critical.
- The weakness is categorized under CWE-502, indicating a failure to properly sanitize user input before processing.
System administrators managing WordPress sites must immediately assess their exposure to the Payever WooCommerce Gateway plugin. The National Vulnerability Database published a record for CVE-2026-42716, identifying a severe security flaw in versions 4.8.2 and earlier. This vulnerability allows attackers to execute arbitrary PHP code on the server without needing valid user credentials. The risk applies to any site running the affected plugin versions without additional network-level protections.
In plain English
The Payever WooCommerce Gateway plugin has a flaw that lets hackers send malicious data to your website. This data is processed as PHP objects by the server, which can lead to full control of the site. Attackers do not need to log in or guess passwords to exploit this issue. The National Vulnerability Database rates this problem as critical with a score of 9.8. This high score reflects the ease of exploitation and the severe impact on system integrity.
The background
The vulnerability is tracked as CVE-2026-42716 in the National Vulnerability Database. It affects the Payever WooCommerce Gateway plugin, a tool used to process payments on WordPress sites. The issue exists in all versions up to and including 4.8.2. The weakness is mapped to CWE-502, which describes improper neutralization of data during deserialization. This means the plugin fails to verify the safety of incoming data before converting it into executable objects on the server.
What changes now
Security teams must verify if their environments include the Payever WooCommerce Gateway plugin. If the installed version is 4.8.2 or lower, the site is vulnerable to remote code execution. Administrators should check their plugin lists immediately. The National Vulnerability Database record confirms the severity but does not mention a patched version. Until a fix is confirmed, the exposure remains active for all unpatched installations.
What to do and how to stay safe: Payever
- Audit all WordPress installations to identify if the Payever WooCommerce Gateway plugin is installed and check its version number.
- Restrict access to the server hosting affected sites using firewalls or web application firewalls to block unauthorized traffic.
- Monitor server logs for unusual PHP execution patterns or unexpected outbound connections that may indicate exploitation attempts.
- Prepare to isolate affected servers from the network if signs of compromise are detected, pending vendor guidance or updates.
Step-by-step guide: Risk-Based Vulnerability Management: Benefits, Limits, and Reality
General security guidance from the Vector Update newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
Which specific versions of the Payever plugin are affected by CVE-2026-42716?
All versions of the Payever WooCommerce Gateway plugin up to and including version 4.8.2 are affected by this vulnerability.
What is the severity rating for this vulnerability?
The National Vulnerability Database rates CVE-2026-42716 as critical with a CVSS score of 9.8.
Does an attacker need to log in to exploit this flaw?
No, the vulnerability allows for unauthenticated exploitation, meaning no login credentials are required to inject PHP objects.
