CVE-2026-25863

Conditional Fields for Contact Form 7 <= 2.7.2 - Unauthenticated Denial of Service

2026-05-04 00:00

Strategic Overview

Status: Patched in 2.7.3
Affected Plugin: Conditional Fields for Contact Form 7
Affected Version: <= 2.7.2
CVSS: 5.3Medium
Weakness type: CWE-1284 · Improper Validation of Specified Quantity in Input
CVE: CVE-2026-25863

View all Conditional Fields for Contact Form 7 vulnerabilities

At a glance

CVE-2026-25863 is a medium-severity Improper Validation of Specified Quantity in Input vulnerability in the Conditional Fields for Contact Form 7 WordPress plugin, affecting versions <= 2.7.2. 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 2.7.3; sites on affected versions should update now. Disclosed May 2026, reported by Rahul Karne.

Vulnerability Overview

The Conditional Fields for Contact Form 7 plugin for WordPress is vulnerable to Denial of Service in all versions up to, and including, 2.7.2. This makes it possible for unauthenticated attackers to starve the server of resources.

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-1284: Improper Validation of Specified Quantity in Input

The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.

Remediation

Update to version 2.7.3, 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: Conditional Fields for Contact Form 7 2.7.3 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-25863 https://www.wordfence.com/threat-intel/vulnerabilities/id/773e2c1f-cebb-46b8-a073-98814c274b8f https://nvd.nist.gov/vuln/detail/CVE-2026-25863

Related records

Other vulnerabilities in Conditional Fields for Contact Form 7

CVSS Vector

5.3

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityLow

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