CVE-2025-23890 Overview
CVE-2025-23890 is a DOM-based Cross-Site Scripting (XSS) vulnerability in the Tom Ewer Easy Tweet Embed plugin for WordPress. The flaw affects all versions of easy-tweet-embed up to and including 1.7. It stems from improper neutralization of user-controllable input during web page generation, classified as [CWE-79].
An attacker can inject malicious script content that executes in the victim's browser under the WordPress site's origin. Exploitation requires low-privileged authentication and user interaction, and the impact crosses a security scope boundary. Successful attacks can lead to session compromise, content manipulation, and redirection of authenticated users.
Critical Impact
Authenticated attackers with low privileges can inject client-side scripts that execute in other users' browsers, enabling session theft and account takeover within the WordPress environment.
Affected Products
- Tom Ewer Easy Tweet Embed WordPress Plugin — all versions through 1.7
- WordPress sites with the easy-tweet-embed plugin installed and activated
- Any downstream site exposing the vulnerable plugin functionality to authenticated users
Discovery Timeline
- 2025-01-16 - CVE-2025-23890 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-23890
Vulnerability Analysis
The vulnerability is a DOM-based XSS flaw in the Easy Tweet Embed plugin. Client-side JavaScript reads attacker-influenced data and writes it into the Document Object Model without proper sanitization or output encoding. When the browser parses the resulting markup, injected script executes in the context of the WordPress site.
DOM-based XSS differs from reflected or stored variants because the payload never needs to appear in the server response body. Instead, the vulnerable sink processes input drawn from the URL, page state, or plugin configuration and renders it as executable HTML.
Exploitation requires user interaction, such as clicking a crafted link or visiting a page containing the malicious payload. Because the vulnerability crosses a scope boundary, injected code can affect resources beyond the vulnerable component itself.
Root Cause
The root cause is missing output encoding on user-controllable values consumed by the plugin's client-side rendering logic. The plugin trusts input passed into DOM sink APIs and does not apply contextual escaping before insertion into HTML contexts.
Attack Vector
An authenticated attacker with contributor-level access or similar low privileges supplies a crafted payload that the plugin later renders in another user's browser. When an administrator or editor loads the affected page, the payload executes with the privileges of the victim's session. See the Patchstack XSS Vulnerability Report for advisory details.
Detection Methods for CVE-2025-23890
Indicators of Compromise
- Unexpected <script> tags, event handlers, or JavaScript URIs stored in tweet-embed content fields
- Outbound requests from browser sessions to unfamiliar domains after visiting pages containing plugin output
- Newly created administrator accounts or altered WordPress user roles following visits by privileged users
- Modified plugin or theme files with obfuscated JavaScript payloads
Detection Strategies
- Inventory WordPress installations and identify sites running easy-tweet-embed version 1.7 or earlier
- Review web server access logs for requests containing script tags, javascript: URIs, or encoded XSS payloads targeting plugin endpoints
- Deploy a web application firewall with rulesets that identify DOM XSS payload patterns
- Monitor browser Content Security Policy violation reports for blocked inline script execution
Monitoring Recommendations
- Alert on modifications to WordPress user accounts, especially privilege escalations or new administrator provisioning
- Track authenticated sessions for anomalous API calls originating from browser contexts of high-privilege users
- Collect and centralize WordPress audit logs to correlate content edits with subsequent session anomalies
How to Mitigate CVE-2025-23890
Immediate Actions Required
- Deactivate the Easy Tweet Embed plugin on any WordPress site running version 1.7 or earlier until a patched release is available
- Restrict contributor and author role assignments to trusted users while the vulnerability remains unpatched
- Force logout of active administrator sessions and rotate credentials if suspicious plugin content is discovered
- Enable a Content Security Policy that blocks inline script execution and restricts script sources
Patch Information
As of the current NVD entry, no fixed version is listed. Consult the Patchstack XSS Vulnerability Report for the latest patch guidance and consider removing the plugin if no update is released.
Workarounds
- Uninstall the easy-tweet-embed plugin and replace it with an actively maintained embedding solution
- Deploy a WordPress-aware web application firewall to filter XSS payloads targeting plugin endpoints
- Restrict access to WordPress editor and contributor roles to reduce the pool of potential attackers
- Apply strict Content Security Policy headers site-wide to limit the impact of successful script injection
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
