CVE-2025-58026 Overview
CVE-2025-58026 is a stored Cross-Site Scripting (XSS) vulnerability in the Termageddon: Cookie Consent & Privacy Compliance WordPress plugin (termageddon-usercentrics). The flaw affects all plugin versions up to and including 1.8.1. It stems from improper neutralization of user-supplied input during web page generation, classified under [CWE-79].
Authenticated attackers with low privileges can inject malicious script payloads that persist in the application and execute in the browsers of users who view the affected pages. Because the scope is changed, the injected script can impact resources beyond the vulnerable component.
Critical Impact
Attackers with low-privileged access can inject persistent JavaScript that executes in visitors' or administrators' browsers, enabling session theft, credential harvesting, and unauthorized actions in the WordPress environment.
Affected Products
- Termageddon: Cookie Consent & Privacy Compliance WordPress plugin (termageddon-usercentrics)
- All plugin versions from initial release through 1.8.1
- WordPress sites running the vulnerable plugin with any user accounts holding contributor-level or higher privileges
Discovery Timeline
- 2025-09-22 - CVE-2025-58026 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-58026
Vulnerability Analysis
The vulnerability is a stored XSS flaw in the Termageddon cookie consent plugin for WordPress. The plugin fails to properly sanitize and encode user-controlled input before rendering it back into web pages. Attackers can submit crafted payloads containing HTML or JavaScript that the application stores and later serves to other users without adequate output encoding.
Exploitation requires an authenticated account with low privileges and some form of user interaction to trigger the payload. Once executed, the injected script runs in the security context of the victim's browser session. This allows the attacker to perform actions on behalf of the victim, exfiltrate cookies, or pivot to other administrative functions.
The changed scope indicator reflects that the injected script can affect resources beyond the plugin itself, including other components of the WordPress site and any authenticated user session that renders the malicious content.
Root Cause
The root cause is improper neutralization of input during web page generation [CWE-79]. Input received from authenticated users is stored and subsequently reflected into HTML output without context-appropriate escaping or sanitization. The plugin does not apply WordPress functions such as esc_html(), esc_attr(), or wp_kses() to untrusted values before rendering.
Attack Vector
The attack vector is network-based and requires authentication with low privileges. An attacker submits crafted input through a plugin interface that stores the payload in the WordPress database. When a subsequent visitor or administrator loads the affected page, the stored script executes in their browser. User interaction is required, meaning the victim must navigate to or otherwise render the page containing the malicious content.
The vulnerability mechanism is described in the Patchstack Vulnerability Report. No public exploit code has been released at this time.
Detection Methods for CVE-2025-58026
Indicators of Compromise
- Unexpected <script> tags, event handlers (onerror, onload, onclick), or javascript: URIs stored in WordPress database tables associated with the Termageddon plugin configuration.
- Outbound browser requests from administrator sessions to unfamiliar domains shortly after loading pages that render plugin-controlled content.
- Unauthorized changes to WordPress user roles, plugin settings, or content shortly after an administrator viewed pages containing plugin output.
Detection Strategies
- Review plugin option values and post metadata for HTML or JavaScript syntax within fields intended to hold plain text.
- Deploy web application firewall (WAF) rules that inspect POST parameters to plugin endpoints for XSS payload patterns.
- Enable a strict Content Security Policy (CSP) and monitor report-uri violations for inline script execution originating from plugin-rendered pages.
Monitoring Recommendations
- Log all administrative actions performed on the Termageddon plugin configuration, including which user account made each change.
- Monitor WordPress authentication logs for anomalous session behavior, such as concurrent sessions or geographic anomalies for privileged users.
- Correlate browser-side error and CSP violation reports with server-side plugin activity to identify injected payload execution.
How to Mitigate CVE-2025-58026
Immediate Actions Required
- Update the Termageddon: Cookie Consent & Privacy Compliance plugin to a version later than 1.8.1 once a patched release is available from the vendor.
- Audit all user accounts with contributor-level or higher privileges and remove or disable accounts that are unused or unnecessary.
- Inspect existing plugin configuration values and stored content for injected HTML or JavaScript, and remove any malicious payloads found.
Patch Information
At the time of publication, the vulnerability affects all versions through 1.8.1. Consult the Patchstack Vulnerability Report for the latest patch availability and vendor guidance.
Workarounds
- Restrict access to the affected plugin's administrative functions to trusted administrators only until a patched version is deployed.
- Deploy a WAF or virtual patching solution with rules that block XSS payload patterns targeting the termageddon-usercentrics plugin endpoints.
- Enforce a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins, reducing the impact of successful injection.
- Consider temporarily deactivating the plugin if the risk of exploitation outweighs the operational need for cookie consent management.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.