CVE-2026-4703 json
WS Form LITE <= 1.10.80 - Unauthenticated PHP Object Injection via Form Submission
published 2026-08-22 2 mo ago modified 2026-10-12 27 d ago also EUVD-2026-64521
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 60%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction
0.90% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- westguard WS Form LITE – Drag & Drop Contact Form Builder
Classification
- Weakness
-
- CWE-502 Deserialization of Untrusted Data
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/df36eae9-6f2b-432c-a765-57450939b344?source=cve
- plugins.trac.wordpress.org /browser/ws-form/trunk/includes/core/class-ws-form-submit.php#L1061
- plugins.trac.wordpress.org /browser/ws-form/trunk/includes/class-ws-form-common.php#L7154
- plugins.trac.wordpress.org /changeset/3489609/
Sources
- CVE List CVE-2026-4703
- NVD CVE-2026-4703
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