CVE-2026-9253
Deferred Deferred - Pending Action

Stored XSS in WP Cost Estimation & Payment Forms Builder Plugin

Publication date: 2026-07-09

Last updated on: 2026-07-09

Assigner: Wordfence

Description
The WP Cost Estimation & Payment Forms Builder (E&P Forms) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'customerInfos' parameter in all versions up to, and including, 10.5.97 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

CVSS Scores

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Meta Information

Published
2026-07-09
Last Modified
2026-07-09
Generated
2026-07-16
AI Q&A
2026-07-09
EPSS Evaluated
2026-07-14
NVD
CVE-2026-9253
EUVD
EUVD-2026-42579

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
loopus_tech wp_cost_estimation_and_payment_forms_builder to 10.5.97 (inc)
wp_cost_estimation_and_payment_forms_builder ep_forms to 10.5.97 (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

The WP Cost Estimation & Payment Forms Builder plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in the 'customerInfos' parameter in all versions up to and including 10.5.97.

This vulnerability exists because the plugin does not properly sanitize input or escape output, allowing attackers to inject malicious web scripts.

These injected scripts are stored and executed whenever a user accesses the affected page, potentially compromising user security.

Impact Analysis

This vulnerability allows unauthenticated attackers to inject arbitrary scripts that execute in the context of users visiting the affected pages.

As a result, attackers could steal sensitive information, hijack user sessions, perform actions on behalf of users, or deliver malicious payloads.

The CVSS score of 7.2 indicates a high severity with network attack vector, low attack complexity, no privileges required, and no user interaction needed.

Compliance Impact

The vulnerability allows unauthenticated attackers to inject arbitrary web scripts via stored cross-site scripting (XSS), which can lead to unauthorized access to user data or session hijacking.

Such security weaknesses can impact compliance with standards like GDPR and HIPAA, as these regulations require protection of personal data and secure handling of user information to prevent unauthorized access or data breaches.

Specifically, exploitation of this vulnerability could result in exposure or compromise of personal data, thereby violating data protection requirements and potentially leading to regulatory penalties.

Mitigation Strategies

To mitigate this vulnerability, you should update the WP Cost Estimation & Payment Forms Builder plugin to a version later than 10.5.97 where the issue is fixed.

Additionally, consider implementing web application firewall (WAF) rules to block malicious input targeting the 'customerInfos' parameter to prevent stored cross-site scripting attacks.

Ensure that users accessing the WordPress site have appropriate security measures such as up-to-date browsers and security plugins to reduce the impact of potential XSS attacks.

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