CVE-2025-23897 Overview
CVE-2025-23897 is a DOM-based Cross-Site Scripting (XSS) vulnerability in the Apply with LinkedIn buttons WordPress plugin developed by ivobrett. The flaw affects all plugin versions up to and including 2.3. It stems from improper neutralization of input during web page generation, cataloged under [CWE-79]. Attackers with low-level privileges can inject malicious scripts that execute in a victim's browser when the user interacts with a crafted request. The issue was published to the National Vulnerability Database (NVD) on January 16, 2025.
Critical Impact
Successful exploitation allows attackers to execute arbitrary JavaScript in the context of a victim's browser session, potentially leading to session hijacking, credential theft, or unauthorized actions performed on behalf of the user.
Affected Products
- ivobrett Apply with LinkedIn buttons WordPress plugin
- All versions from n/a through <= 2.3
- WordPress installations with the apply-with-linkedin-buttons plugin activated
Discovery Timeline
- 2025-01-16 - CVE CVE-2025-23897 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-23897
Vulnerability Analysis
The vulnerability is a DOM-based Cross-Site Scripting (XSS) flaw classified under [CWE-79]. The plugin fails to properly neutralize user-controllable input before it is written to the Document Object Model (DOM) during web page generation. Because sanitization occurs client-side or not at all, attacker-controlled data reaches a sink such as innerHTML or document.write without adequate encoding.
Exploitation requires user interaction and low-privilege authenticated access. The scope-changed impact means injected script can affect resources beyond the vulnerable component, including the browser session of any user who triggers the payload. The EPSS score is 0.368% at the 28th percentile, indicating a low current probability of observed exploitation attempts.
Root Cause
The root cause is missing or insufficient output encoding when the plugin renders parameters into the page. The plugin trusts input that can be influenced by an attacker and reflects it into the DOM without applying context-appropriate escaping. Because the injection point is processed client-side by JavaScript, server-side filters and web application firewalls have limited visibility into the payload.
Attack Vector
An authenticated attacker with contributor-level or similar low privileges crafts a URL or input containing a JavaScript payload. The attacker persuades a victim, such as an administrator, to visit the crafted page or interact with the manipulated element. The victim's browser executes the injected script in the origin of the WordPress site, granting the attacker access to cookies, session tokens, and any actions the user can perform.
Detailed technical analysis is available in the Patchstack XSS Vulnerability Report.
Detection Methods for CVE-2025-23897
Indicators of Compromise
- Unexpected <script> tags, javascript: URIs, or event handler attributes such as onerror and onload in HTTP request parameters targeting plugin endpoints
- WordPress audit log entries showing administrative actions initiated from unusual sessions after users interacted with plugin-rendered pages
- Browser console errors or Content Security Policy (CSP) violations tied to inline script execution on pages served by the apply-with-linkedin-buttons plugin
Detection Strategies
- Inspect web server access logs for requests containing URL-encoded script fragments, HTML entities, or DOM sink references directed at plugin URLs
- Deploy a Content Security Policy that blocks inline scripts and reports violations to a monitored endpoint
- Perform authenticated vulnerability scans that specifically test DOM-based XSS sinks in WordPress plugins
Monitoring Recommendations
- Enable WordPress activity logging to capture privilege changes, plugin edits, and administrative actions performed after suspicious page loads
- Forward web server and application logs to a centralized analytics platform to correlate injection attempts with subsequent session activity
- Monitor for outbound requests from browsers to unfamiliar domains that could indicate data exfiltration via injected script
How to Mitigate CVE-2025-23897
Immediate Actions Required
- Identify all WordPress instances running the apply-with-linkedin-buttons plugin at version 2.3 or earlier
- Deactivate and remove the plugin until a patched release is confirmed by the maintainer
- Rotate credentials and invalidate active sessions for any administrator who may have interacted with untrusted content
Patch Information
At the time of publication, no fixed version is listed in the advisory. Refer to the Patchstack XSS Vulnerability Report for current remediation status and monitor the WordPress plugin repository for a security update.
Workarounds
- Remove the plugin from production sites and use an alternative LinkedIn integration method
- Enforce a strict Content Security Policy that disallows inline scripts and restricts allowed script sources
- Restrict low-privilege user accounts and enforce multi-factor authentication for all editorial and administrative roles
- Deploy a web application firewall rule set that filters common XSS payload patterns targeting WordPress plugins
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
