CVE-2025-22528 is a medium-severity vulnerability that allows for improper neutralization of input during web page generation, specifically a stored cross-site scripting (XSS) issue in the Huurkalender WP plugin. This vulnerability affects Huurkalender WP versions up to and including 1.5.6. The CVSS score of 6.5 indicates a medium severity, suggesting that while the vulnerability can be exploited, it requires specific conditions to be met.
Organizations utilizing the affected plugin need to be aware of the risks associated with this vulnerability, as attackers may leverage it to execute arbitrary scripts in the context of users' web browsers, potentially leading to unauthorized actions and data exposure.
The urgency for defenders is heightened due to the potential impact of XSS vulnerabilities, which can result in session hijacking, data theft, and other malicious activities. Organizations should prioritize patching immediately to mitigate these risks.
Currently, there is no public exploit confirmed for this vulnerability, and it is not listed in the Known Exploited Vulnerabilities (KEV) catalog. However, the potential for exploitation remains a concern, making timely remediation essential.
Organizations should also monitor for any signs of attempted exploitation and ensure that their security practices are aligned with the latest threat intelligence.
Vulnerability Details
CVE-2025-22528 is classified as a Cross-site Scripting (XSS) vulnerability under CWE-79. The vulnerability affects Huurkalender WP plugin versions from n/a to 1.5.6 and was published on January 7, 2025. The CVSS score of 6.5 indicates a medium severity level, highlighting the importance of addressing this issue promptly.
Technical Analysis
The root cause of this vulnerability lies in the improper handling of user input, which can lead to the execution of malicious scripts within the web application. The attack vector is primarily network-based, requiring low complexity and low privileges for exploitation, but user interaction is necessary to trigger the XSS attack.
The vulnerability has a low impact on confidentiality, integrity, and availability, which is indicated by the CVSS vector string: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L.
Risk & Impact Analysis
Risk to organizations includes exposure to malicious scripts that can lead to unauthorized actions by users, data breaches, and potential damage to reputation. The blast radius is significant, particularly for organizations with high web traffic or sensitive user data. Given the CVSS score and the potential for exploitation, organizations should address this vulnerability in their priority patch cycle.
Organizations should also consider the long-term implications of not addressing such vulnerabilities, as they may lead to broader security incidents if exploited.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects Huurkalender WP plugin versions from n/a through 1.5.6. Organizations using these versions should take immediate action to secure their installations.
Mitigation & Remediation
Organizations should prioritize applying the latest patches provided by the Huurkalender WP plugin developers. If a patch is not available, consider implementing workarounds, such as disabling the plugin or applying input validation measures to mitigate the risk of XSS attacks. For further guidance on best practices, organizations can refer to our application security assessment services.
Detection Guidance
Security teams should monitor logs for unusual activities indicative of XSS exploitation attempts. Behavioral anomalies in web applications, such as unexpected JavaScript execution, should also be flagged for investigation.
AppSecure Threat Intelligence Insight
CVE-2025-22528 represents a persistent threat that highlights the risks associated with improper input handling in web applications. The trend of XSS vulnerabilities persists, signaling a need for security teams to enhance their defense mechanisms. Organizations should consider regular security assessments and penetration testing as part of their security strategy to identify and remediate vulnerabilities effectively.
This vulnerability serves as a reminder of the ongoing challenges in web application security, underscoring the importance of secure coding practices and thorough vulnerability assessments to safeguard against potential exploits.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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