CVE-2026-4703Network attack vector

Unauthenticated object injection via form meta deserialization

Published Aug 22, 2026 · Updated Aug 22, 2026

PHP object injection in WS Form LITE 1.10.80 and earlier allows remote attackers to submit crafted serialized form metadata. The submission-loading path in includes/core/class-ws-form-submit.php passes attacker-controlled meta_value data to unserialize(), allowing arbitrary PHP objects to be instantiated. Exploitation has no impact without a POP chain from another installed plugin or theme; with one, the chain can delete files, disclose data, or execute code.

CVSS severity9.8
Critical
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

PHP object injection in WS Form LITE 1.10.80 and earlier allows remote attackers to submit crafted serialized form metadata. The submission-loading path in includes/core/class-ws-form-submit.php passes attacker-controlled meta_value data to unserialize(), allowing arbitrary PHP objects to be instantiated. Exploitation has no impact without a POP chain from another installed plugin or theme; with one, the chain can delete files, disclose data, or execute code.

The record

CVE
CVE-2026-4703
Published
Aug 22, 2026
Updated
Aug 22, 2026
Vendor
Westguard Solutions
Product
WS Form LITE
Classifications
CWE-502, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.10.80

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Westguard Solutions · WS Form LITEversion=0 <=1.10.80

Published CVSS scores

9.8WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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