CVE-2026-65510
Received Received - Intake

Unauthenticated XSS in Ultimate Invoice

Publication date: 2026-07-23

Last updated on: 2026-07-23

Assigner: Patchstack

Description
Unauthenticated Cross Site Scripting (XSS) in PeproDev Ultimate Invoice <= 2.2.6 versions.

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Meta Information

Published
2026-07-23
Last Modified
2026-07-23
Generated
2026-07-23
AI Q&A
2026-07-23
EPSS Evaluated
N/A
NVD
CVE-2026-65510
EUVD
EUVD-2026-48116

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
peprodev ultimate_invoice to 2.2.6 (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.

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Executive Summary

This is an Unauthenticated Cross Site Scripting (XSS) vulnerability found in PeproDev Ultimate Invoice versions 2.2.6 and below. 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 PeproDev Ultimate Invoice <= 2.2.6, inspect web application inputs for unsanitized user-supplied data. Check URL parameters, form fields, and HTTP headers for reflective or stored XSS payloads like <script>alert(1)</script>. Use browser developer tools to monitor network requests for suspicious input handling.

Impact Analysis

An attacker could exploit this to steal user sessions, redirect users to malicious sites, or deface web pages. Users with sensitive data in the application could have their information compromised.

Compliance Impact

This vulnerability could lead to unauthorized access to personal data, violating GDPR and HIPAA requirements for data protection and security. Organizations may face compliance violations and legal penalties.

Mitigation Strategies

Immediately update PeproDev Ultimate Invoice to the latest version beyond 2.2.6. If an update is unavailable, apply input validation and output encoding to all user-supplied data. Use Content Security Policy (CSP) headers to mitigate XSS impact. Disable unnecessary user roles with edit permissions until patched.

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