CVE-2025-8568 in GMap Generator Plugin
Summary
by MITRE • 08/12/2025
The GMap Generator plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘h’ parameter in all versions up to, and including, 1.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
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Analysis
by VulDB Data Team • 08/12/2025
The GMap Generator plugin for WordPress presents a critical stored cross-site scripting vulnerability identified as CVE-2025-8568, affecting all versions up to and including 1.1. This vulnerability stems from inadequate input sanitization and output escaping mechanisms within the plugin's codebase, creating a persistent security weakness that can be exploited by authenticated attackers. The flaw specifically resides in the handling of the 'h' parameter, which serves as an entry point for malicious script injection. The vulnerability's severity is amplified by the fact that it requires only Contributor-level access or higher, making it particularly dangerous as it can be exploited by users who already have some level of administrative privileges within the WordPress environment. This access level is often granted to content creators, editors, and other trusted users who may not be fully security-aware, increasing the potential attack surface significantly. The stored nature of this XSS vulnerability means that malicious scripts are permanently saved within the application's database, ensuring that the payload executes every time affected pages are accessed by any user, including administrators. This persistent execution model transforms what might initially appear as a minor scripting issue into a serious threat vector that can compromise entire WordPress installations.
The technical implementation of this vulnerability demonstrates a classic input validation failure pattern that aligns with CWE-79, which specifically addresses Cross-Site Scripting flaws in web applications. The plugin fails to properly sanitize user input before storing it in the database, and subsequently fails to adequately escape output when rendering the stored content. This dual failure creates an environment where attacker-controlled data can be seamlessly injected into the application's response stream without proper context-aware escaping. The 'h' parameter serves as the primary attack vector, likely representing a map height configuration or similar parameter that accepts user input. When this parameter contains malicious script code, the plugin's insufficient sanitization allows the code to be stored in the database, while the inadequate output escaping prevents proper HTML encoding during display. This combination creates a perfect storm for XSS exploitation, as the malicious code becomes part of the application's legitimate content and executes in the context of other users' browsers. The vulnerability's impact extends beyond simple script execution, as it can be leveraged for session hijacking, credential theft, and further exploitation of the compromised WordPress environment. Attackers can craft payloads that redirect users to malicious sites, steal cookies, or even inject additional malicious code that can escalate privileges within the WordPress installation.
The operational impact of CVE-2025-8568 represents a significant risk to WordPress installations using the vulnerable GMap Generator plugin, particularly in environments where Contributor-level users have access to plugin configuration interfaces. The vulnerability creates a persistent backdoor that remains active until the plugin is updated or uninstalled, making it a long-term threat to site security. Any user with Contributor access or higher can potentially compromise the entire site's integrity, as their actions can affect all users who access pages containing the stored malicious content. This risk is particularly concerning in collaborative environments where multiple users have editing privileges, as a single compromised user account can lead to widespread exploitation. The stored nature of the vulnerability means that even if the initial injection is discovered and patched, the malicious content remains embedded in the database and continues to execute until manually removed. The attack surface expands beyond individual pages to potentially affect the entire WordPress ecosystem, as the malicious scripts can access cookies, localStorage, and other browser resources that may contain sensitive information. This vulnerability can be leveraged as a stepping stone for more sophisticated attacks, including privilege escalation within the WordPress environment, data exfiltration, or the establishment of persistent command and control channels that can be used for further attacks against the organization's infrastructure.
Mitigation strategies for CVE-2025-8568 should focus on immediate remediation and long-term security hardening measures. The most effective immediate action is to update the GMap Generator plugin to the latest version that addresses this vulnerability, which should be verified against the plugin's official release notes and security advisories. Organizations should also implement additional security controls such as restricting Contributor-level access to plugin configuration interfaces, implementing web application firewalls that can detect and block XSS payloads, and conducting regular security audits of plugin installations. The principle of least privilege should be strictly enforced, ensuring that users with Contributor access or higher cannot modify critical application parameters that could introduce security vulnerabilities. Regular security scanning of WordPress installations should include checks for outdated plugins and themes, with automated alerts for any identified vulnerabilities. Organizations should also consider implementing Content Security Policy headers that can prevent execution of unauthorized scripts, though this should complement rather than replace proper input sanitization. The vulnerability highlights the importance of proper input validation and output escaping practices, which aligns with ATT&CK technique T1213.002 for credential access and T1059.001 for command and scripting interpreter. Regular security training for users with administrative privileges is essential to prevent accidental exploitation through social engineering or compromised accounts. Additionally, maintaining detailed logs of plugin modifications and user activities can help detect potential exploitation attempts and provide evidence for incident response procedures.