CVE-2026-4703 WS Form LITE <= 1.10.80 - Unauthenticated PHP Object Injection via Form Submission
Unauthenticated attackers can inject PHP objects via form submissions, potentially leading to code execution or data exposure if a POP chain exists.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4703?
CVE-2026-4703 is a critical unsafe deserialization vulnerability in westguard WS Form LITE – Drag & Drop Contact Form Builder, published on 22 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The WS Form LITE – Drag & Drop Contact Form Builder plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.10.80 via deserialization of untrusted input from form submission meta values. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.
Weakness: CWE-502
Which versions are affected by CVE-2026-4703?
How do I fix CVE-2026-4703?
No fix has been published for CVE-2026-4703 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-4703 being exploited?
There is no known exploitation of CVE-2026-4703 in the wild and no public exploit code.
Sources
Also known as GHSA-hpc2-mqfw-fq4q.