Sign-up Sheets <= 2.3.2 - Unauthenticated PHP Object Injection

Deserialization of Untrusted Data
CVE CVE-2025-49393
CVSS High (8.1)
Publicly Published September 23, 2025
Last Updated September 30, 2025
Researcher ChuongVN
Description

The Sign-up Sheets plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 2.3.2 via deserialization of untrusted input. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.

References

1 affected software package

Software Type Plugin
Software Slug sign-up-sheets (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 2.3.2
Patched Version
  • 2.3.3
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