CVE-2025-23503 is a high-severity vulnerability classified as a reflected cross-site scripting (XSS) issue within the osolwordpress Customizable Captcha and Contact Us plugin. This vulnerability allows attackers to inject malicious scripts into web pages, potentially compromising user data and session integrity. The CVSS score of 7.1 indicates a significant risk that organizations must address promptly.
The vulnerability affects versions of the Customizable Captcha and Contact Us plugin from an unspecified version through 1.0.2. Attackers may leverage this vulnerability to perform malicious actions, especially if users interact with compromised pages. Organizations using this plugin should prioritize remediation measures to mitigate the risk.
Given that the vulnerability is classified as high severity, organizations should assess their exposure and take immediate action. The status of this vulnerability is currently deferred, indicating that further investigation may be required to understand its full impact and exploitation potential.
Organizations are urged to monitor this vulnerability closely and prepare for potential patches or updates that may be released by the vendor.
Vulnerability Details
The vulnerability, described as 'Improper Neutralization of Input During Web Page Generation (Cross-site Scripting)', allows for reflected XSS attacks. This issue specifically impacts the osolwordpress Customizable Captcha and Contact Us plugin version 1.0.2 and below. The CWE classification for this vulnerability is CWE-79.
The CVSS score of 7.1 indicates high severity, which indicates that the potential impact on confidentiality, integrity, and availability is significant. The attack vector is classified as NETWORK, with low attack complexity and no privileges required for exploitation. User interaction is required to trigger the vulnerability.
The vulnerability was published on January 22, 2025, and has been last modified on April 23, 2026.
Technical Analysis
The root cause of CVE-2025-23503 is inadequate input validation during the web page generation process, allowing attackers to inject scripts that execute in the context of a victim's browser. The attack vector is network-based, requiring user interaction to exploit the vulnerability. Attack complexity is low, and the attacker does not require any privileges.
The impact on confidentiality, integrity, and availability is classified as low, although the potential for data exposure and manipulation remains. Organizations should evaluate their current security posture concerning user input validation and output encoding to prevent such vulnerabilities.
Risk & Impact Analysis
Risk to organizations includes potential data exposure, unauthorized actions performed in the context of users, and damage to reputation due to compromised user experiences. The vulnerability's low likelihood of exploitation combined with its high impact means that organizations must prioritize addressing this risk.
The presence of this vulnerability may have a broad blast radius, especially for organizations with a large user base utilizing the affected plugin. Immediate remediation is essential to prevent exploitation and maintain user trust.
Given the CVSS score and the risk context, organizations are urged to address this vulnerability in their priority patch cycle.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of the osolwordpress Customizable Captcha and Contact Us plugin range from an unspecified version to version 1.0.2. Organizations should ensure that they are using a patched version to mitigate risks associated with this vulnerability.
Mitigation & Remediation
Organizations should prioritize applying patches or updates from the vendor to remediate this vulnerability. Regular updates to the Customizable Captcha and Contact Us plugin will help address security vulnerabilities effectively.
In the absence of an immediate patch, organizations should consider implementing input validation and output encoding measures to protect against XSS attacks. Regular security assessments, including penetration testing, can help identify potential vulnerabilities in existing systems.
Detection Guidance
To detect potential exploitation attempts related to this vulnerability, organizations should monitor logs for unusual user input, particularly in fields associated with the Customizable Captcha and Contact Us plugin.
Behavioral anomalies, such as unexpected redirects or JavaScript execution, should be investigated promptly. Additionally, network signatures may help identify malicious traffic patterns that exploit this vulnerability.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2025-23503 lies in the ongoing challenges organizations face in securing web applications against XSS vulnerabilities. This incident underscores the importance of robust input validation and output encoding practices in application development.
Security teams must remain vigilant and adopt comprehensive security testing methodologies to discover vulnerabilities before they are exploited. Organizations are encouraged to follow best practices in penetration testing methodology and integrate security into the software development lifecycle.
Additionally, organizations should stay informed about emerging threats and vulnerabilities through resources like the AppSecure blog, which offers insights on current trends and security best practices.
By taking a proactive approach, organizations can better defend against threats and enhance their overall security posture.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)