CVE-2026-57415 Overview
CVE-2026-57415 is a stored cross-site scripting (XSS) vulnerability in the Codemenschen Gift Vouchers plugin for WordPress. The flaw stems from improper neutralization of user-supplied input during web page generation [CWE-79]. Attackers can inject persistent JavaScript payloads that execute in the browsers of users who view affected pages. The issue affects all versions of the gift-voucher plugin up to and including 4.7.0. Successful exploitation requires user interaction and can result in session compromise, credential theft, or unauthorized actions performed in the context of the victim.
Critical Impact
Attackers can store malicious scripts that execute across trust boundaries, compromising administrators and site visitors who load affected content.
Affected Products
- Codemenschen Gift Vouchers plugin (gift-voucher) for WordPress
- All versions from initial release through 4.7.0
- WordPress sites with the vulnerable plugin installed and activated
Discovery Timeline
- 2026-07-13 - CVE-2026-57415 published to NVD
- 2026-07-13 - Last updated in NVD database
Technical Details for CVE-2026-57415
Vulnerability Analysis
The vulnerability is a stored cross-site scripting flaw classified under [CWE-79]. The plugin fails to sanitize or encode user-controlled input before rendering it in generated web pages. Malicious payloads persist in the WordPress database and execute each time a user loads a page containing the injected content. Because the scope changes across trust boundaries, an attacker's script runs in the security context of the vulnerable site.
Exploitation requires user interaction, such as an administrator viewing a voucher record or a customer loading a page containing the attacker's payload. Confidentiality, integrity, and availability are each affected at a limited level per the CVSS vector.
Root Cause
The plugin accepts input fields associated with gift voucher functionality and stores them without applying output encoding or context-aware sanitization. When the stored data is later rendered inside HTML, browser parsers execute embedded script tags or event handlers. The absence of functions such as esc_html(), esc_attr(), or wp_kses() at the output layer is the underlying defect.
Attack Vector
An unauthenticated attacker can submit crafted input over the network to a form or endpoint exposed by the Gift Vouchers plugin. The payload is stored in the WordPress database. When an authenticated user, typically an administrator managing vouchers, loads the affected page, the payload executes in their browser. Attackers commonly use this class of flaw to hijack administrator sessions, create rogue accounts, or pivot to further compromise of the WordPress instance.
No verified public exploit code is available. Refer to the Patchstack XSS Vulnerability Advisory for technical specifics.
Detection Methods for CVE-2026-57415
Indicators of Compromise
- Unexpected <script> tags, onerror, onload, or javascript: URIs stored in WordPress database tables associated with the gift-voucher plugin.
- Outbound HTTP requests from administrator browsers to unfamiliar external hosts shortly after viewing voucher management pages.
- Creation of new administrator accounts or modification of user roles without a corresponding audit trail.
Detection Strategies
- Inspect plugin-related database rows for HTML markup or script payloads that should not appear in gift voucher fields.
- Review web server access logs for POST requests to gift-voucher endpoints containing encoded script fragments or < and > characters.
- Deploy a web application firewall rule that flags common XSS signatures targeting plugin submission endpoints.
Monitoring Recommendations
- Monitor WordPress administrator sessions for anomalous JavaScript execution, cookie access patterns, or DOM manipulation.
- Alert on new WordPress user creation, role escalation, and plugin installation events following voucher page views.
- Track version metadata of the gift-voucher plugin across managed WordPress installations to identify unpatched instances.
How to Mitigate CVE-2026-57415
Immediate Actions Required
- Update the Codemenschen Gift Vouchers plugin to a version later than 4.7.0 as soon as a fixed release is available from the vendor.
- Audit existing voucher records and remove any entries containing script tags, event handler attributes, or encoded JavaScript.
- Rotate credentials and session tokens for administrators who accessed affected pages during the exposure window.
Patch Information
At the time of publication, the vulnerability affects the gift-voucher plugin through version 4.7.0. Consult the Patchstack XSS Vulnerability Advisory for vendor patch status and remediation guidance.
Workarounds
- Deactivate the Gift Vouchers plugin until a patched version is deployed.
- Restrict access to voucher submission endpoints using a web application firewall that filters HTML and script metacharacters.
- Enforce a strict Content Security Policy (CSP) on the WordPress site to limit inline script execution and reduce XSS impact.
# Content Security Policy header example for Apache
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
