CVE-2025-9823
MediumCVSS 4.8Exploitation Probability (EPSS)
Low risk23th percentile - higher than 23% of all known CVEs
Summary
A reflected Cross-Site Scripting (XSS) vulnerability in the “Tags” input field on the /s/ajax?action=lead:addLeadTags endpoint. User-supplied input is reflected back in the server’s response without proper sanitization or escaping, allowing execution of arbitrary JavaScript in the victim’s session.
Risk Assessment
An attacker can hijack a user’s session, steal credentials, or perform unauthorized actions in the application. They may also redirect users to malicious sites or manipulate page content.
Recommendation
Implement proper sanitization and escaping for input in the “Tags” field and endpoint. Update the application to a version containing the fix.
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Original NVD description (English source)
SummaryA Cross-Site Scripting (XSS) vulnerability allows an attacker to execute arbitrary JavaScript in the context of another user’s session. This occurs because user-supplied input is reflected back in the server’s response without proper sanitization or escaping, potentially enabling malicious actions such as session hijacking, credential theft, or unauthorized actions in the application. DetailsThe vulnerability resides in the “Tags” input field on the /s/ajax?action=lead:addLeadTags endpoint. Although the server applies sanitization before storing the data or returning it later, the payload is executed immediately in the victim’s browser upon reflection, allowing an attacker to run arbitrary JavaScript in the user’s session. ImpactA Reflected XSS attack can have a significant impact, allowing attackers to steal sensitive user data like cookies, redirect users to malicious websites, manipulate the web page content, and essentially take control of a user's session within an application by executing malicious JavaScript code within the victim's browser, even if the server-side code is secure; essentially enabling them to perform actions as if they were the logged-in user. References * Web Security Academy: Cross-site scripting https://portswigger.net/web-security/cross-site-scripting * Web Security Academy: Reflected cross-site scripting https://portswigger.net/web-security/cross-site-scripting/reflected
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

