Quick answers
- Is CVE-2026-42687 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-42687 being exploited in the wild.
- How severe is CVE-2026-42687?
- High severity, with a CVSS score of 8.1, published 15 June 2026.
- Which products and versions are affected?
- EventPrime <= 4.3.2.1.
- Is there a fix for CVE-2026-42687?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-42687 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-42687?
- Check whether you run EventPrime at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The EventPrime plugin for WordPress is vulnerable to PHP Object Injection via the deserialization of untrusted data (CWE-502). This occurs because the application fails to properly validate user-supplied input before passing it to a PHP deserialization function. An unauthenticated remote attacker can exploit this by sending a specially crafted payload. If a suitable Property-Oriented Programming (POP) chain is present in the environment, the attacker could achieve remote code execution, perform SQL injection, or conduct arbitrary file operations. The vulnerability is patched in version 4.3.2.2.
Affected products
- EventPrime EventPrime <= 4.3.2.1
Timeline
- 2026-04-25: other: Reported by researcher hhhai
- 2026-05-25: advisory: Initial advisory published by Patchstack
- 2026-06-15: disclosed: NVD publication date