CVE-2026-81300
Deferred Deferred - Pending Action

Unauthenticated XSS in Calculation for Contact Form 7

Publication date: 2026-09-03

Last updated on: 2026-09-03

Assigner: Patchstack

Description
Unauthenticated Cross Site Scripting (XSS) in Calculation For Contact Form 7 <= 1.0 versions.

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Meta Information

Published
2026-09-03
Last Modified
2026-09-03
Generated
2026-09-03
AI Q&A
2026-09-03
EPSS Evaluated
N/A
NVD
CVE-2026-81300
EUVD
EUVD-2026-70593

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
contact_form_7 contact_form_7 to 1.0 (inc)
patchstack calculation_for_contact_form_7 to 1.0 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

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Executive Summary

This is an Unauthenticated Cross Site Scripting (XSS) vulnerability found in the Calculation For Contact Form 7 plugin versions 1.0 or lower. It allows attackers to inject malicious scripts into web pages viewed by other users without needing authentication.

Detection Guidance

To detect this XSS vulnerability in the Calculation For Contact Form 7 plugin, check if your WordPress site is running version 1.0 or below. You can do this by inspecting the plugin files or using WordPress admin panel under Plugins. Look for the plugin version in the plugin details or via WP-CLI with the command 'wp plugin list'.

Impact Analysis

An attacker could exploit this to steal user sessions, deface websites, or redirect users to malicious sites. It may also lead to unauthorized data access or manipulation if combined with other vulnerabilities.

Compliance Impact

This XSS vulnerability could lead to data breaches, compromising personal or sensitive data. This may violate GDPR (data protection) and HIPAA (health information) requirements, potentially resulting in legal penalties and loss of trust.

Mitigation Strategies

Update Calculation For Contact Form 7 to the latest version to patch the XSS vulnerability. If an update is not available, consider disabling the plugin temporarily until a fix is released.

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