CVE-2026-73379

Contact Form by Supsystic < 1.10.0 - Unauthenticated Payment Bypass

2026-08-18 00:00

Strategic Overview

Status: Patched in 1.10.0
Affected Plugin: Contact Form by Supsystic – Drag & Drop Form Builder with Templates & Form Statistics
Affected Version: < 1.10.0
CVSS: 5.3Medium
Weakness type: CWE-602 · Client-Side Enforcement of Server-Side Security
CVE: CVE-2026-73379

View all Contact Form by Supsystic – Drag & Drop Form Builder with Templates & Form Statistics vulnerabilities

At a glance

CVE-2026-73379 is a medium-severity Client-Side Enforcement of Server-Side Security vulnerability in the Contact Form by Supsystic WordPress plugin, affecting versions < 1.10.0. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 1.10.0; sites on affected versions should update now. Disclosed August 2026, reported by Asim Alshaya.

Vulnerability Overview

The Contact Form by Supsystic plugin for WordPress is vulnerable to Payment Bypass in all versions up to 1.10.0 (exclusive). This makes it possible for unauthenticated attackers to bypass payments.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-602: Client-Side Enforcement of Server-Side Security

The product is composed of a server that relies on the client to implement a mechanism that is intended to protect the server.

Remediation

Update to version 1.10.0, or a newer patched version

How does WordSec protect against this?

This one needs no account at all, which puts it outside what login hardening can reach; WordSec's login security narrows the account-level paths around it, and the firewall is what inspects the request itself. None of that substitutes for the fix: Contact Form by Supsystic 1.10.0 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-73379 https://www.wordfence.com/threat-intel/vulnerabilities/id/aa85e614-b0e0-4d54-a9f0-27c99e898b7d https://nvd.nist.gov/vuln/detail/CVE-2026-73379

Related records

Other vulnerabilities in Contact Form by Supsystic – Drag & Drop Form Builder with Templates & Form Statistics

CVSS Vector

5.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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