CVE-2025-58820 Overview
CVE-2025-58820 is a stored cross-site scripting (XSS) vulnerability in the Themepoints Carousel Ultimate WordPress plugin. The flaw affects all versions up to and including 1.8. It stems from improper neutralization of user-supplied input during web page generation, classified as [CWE-79]. An authenticated attacker with high privileges can inject persistent JavaScript payloads that execute in the browsers of users who view affected pages. Exploitation requires user interaction and can cross a security scope boundary, exposing session data or enabling further actions in the victim's context.
Critical Impact
Stored XSS in Carousel Ultimate ≤ 1.8 allows authenticated attackers to inject persistent scripts that execute against site visitors and administrators, enabling session theft and administrative action hijacking.
Affected Products
- Themepoints Carousel Ultimate WordPress plugin
- Versions from initial release through 1.8
- WordPress sites with the plugin installed and active
Discovery Timeline
- 2025-09-05 - CVE-2025-58820 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-58820
Vulnerability Analysis
The vulnerability is a stored cross-site scripting flaw in the Themepoints Carousel Ultimate plugin for WordPress. Input supplied to carousel configuration fields is stored in the WordPress database without sufficient sanitization or output encoding. When the carousel is rendered on the front end or in the administrative interface, the malicious payload executes in the visitor's browser under the site's origin.
Because the injected payload persists in the database, every request that renders the affected carousel triggers execution. The scope-change attribute indicates the payload can affect resources outside the vulnerable component's initial trust boundary, such as authenticated administrator sessions loading the compromised content.
Root Cause
The plugin fails to apply proper output escaping functions such as esc_html(), esc_attr(), or wp_kses() when rendering carousel content stored from the plugin's settings interface. Input sanitization on write and contextual escaping on read are both insufficient, allowing HTML and JavaScript to survive round-tripping through the database.
Attack Vector
Exploitation requires an authenticated user with high privileges, typically an administrator or editor with access to the plugin's carousel configuration. The attacker submits carousel content containing HTML <script> tags or event-handler attributes such as onerror or onload. When any user, including higher-privileged administrators, loads a page that renders the poisoned carousel, the payload executes. Successful exploitation can lead to session cookie theft, forced administrative actions via authenticated requests, or drive-by redirection to attacker-controlled infrastructure. See the Patchstack XSS Vulnerability Report for additional technical detail.
Detection Methods for CVE-2025-58820
Indicators of Compromise
- Unexpected <script>, <iframe>, or event-handler attributes stored in WordPress wp_posts or wp_options rows associated with the Carousel Ultimate plugin.
- Outbound requests from site visitors to unfamiliar domains originating from pages that render carousel elements.
- Administrator accounts performing unauthorized configuration changes shortly after loading pages containing carousel widgets.
Detection Strategies
- Scan the WordPress database for carousel-related records containing HTML tags, JavaScript URI schemes, or encoded payloads such as javascript: or %3Cscript%3E.
- Inspect rendered carousel markup on the front end for injected inline scripts or suspicious event handlers.
- Correlate WordPress audit logs with plugin configuration edits made by high-privilege accounts to identify the injection point.
Monitoring Recommendations
- Enable a web application firewall (WAF) with XSS payload detection rules covering both request and response bodies.
- Log and alert on modifications to WordPress plugin settings, especially by newly created or dormant privileged accounts.
- Monitor Content Security Policy (CSP) violation reports for inline script execution on pages containing carousel widgets.
How to Mitigate CVE-2025-58820
Immediate Actions Required
- Identify all WordPress installations running Themepoints Carousel Ultimate 1.8 or earlier and audit their carousel configurations.
- Deactivate the plugin on affected sites until a patched release is confirmed available and deployed.
- Rotate credentials and session tokens for administrator accounts that may have loaded compromised pages.
Patch Information
No fixed version has been published in the referenced advisory at the time of NVD publication. Monitor the Patchstack XSS Vulnerability Report and the plugin's WordPress.org listing for a security update, and apply it as soon as it becomes available.
Workarounds
- Restrict access to plugin configuration screens to a minimal set of trusted administrator accounts.
- Deploy a WAF ruleset that blocks HTML and JavaScript payloads submitted to Carousel Ultimate settings endpoints.
- Implement a strict Content Security Policy that disallows inline scripts and untrusted script sources site-wide.
# Example CSP header to reduce stored XSS impact
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'self'"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
