CVE-2025-6923 in UNIS
Summary
by MITRE • 12/09/2025
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Talent Software UNIS allows Reflected XSS.
This issue affects UNIS: before 42957.
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Analysis
by VulDB Data Team • 06/06/2026
The vulnerability identified as CVE-2025-6923 represents a critical security flaw in the Talent Software UNIS platform that enables reflected cross-site scripting attacks. This weakness occurs during the web page generation process where input validation and sanitization mechanisms fail to properly neutralize malicious user-supplied data before incorporating it into dynamic web content. The vulnerability specifically affects versions of UNIS prior to build 42957, indicating that the developers have likely addressed this issue in subsequent releases through proper input sanitization and output encoding measures.
The technical implementation of this reflected XSS vulnerability stems from insufficient validation of user input parameters that are directly echoed back to web browsers without proper sanitization. When an attacker crafts malicious input containing script payloads and injects it into URL parameters or form fields, the application fails to neutralize these inputs during the page generation phase. This allows the malicious scripts to execute within the context of the victim's browser session, potentially stealing cookies, session tokens, or performing unauthorized actions on behalf of users. The reflected nature of this vulnerability means that the malicious script is reflected off the web server rather than being stored, making it particularly dangerous for targeted attacks.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable sophisticated attack vectors including session hijacking, credential theft, and privilege escalation within the application environment. Attackers can leverage this vulnerability to impersonate legitimate users, access sensitive data, or manipulate application functionality. The vulnerability's presence in UNIS applications creates potential for widespread compromise across organizations that rely on this platform for talent management and human resources operations, particularly given the sensitive nature of personnel data typically handled by such systems. This risk is compounded by the fact that reflected XSS attacks can be delivered through social engineering tactics such as phishing emails containing malicious links that exploit this vulnerability.
Mitigation strategies for CVE-2025-6923 should prioritize immediate implementation of input validation and output encoding measures to prevent malicious data from being executed as scripts. Organizations should upgrade to UNIS version 42957 or later where the vulnerability has been addressed through proper input sanitization mechanisms. Security controls should include implementing Content Security Policy headers, employing proper HTML encoding for dynamic content, and establishing comprehensive input validation routines that filter or escape potentially dangerous characters. Additionally, regular security testing including automated vulnerability scanning and manual penetration testing should be conducted to identify similar input validation weaknesses. The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws, and represents a clear violation of the principle of least privilege and secure coding practices. From an ATT&CK framework perspective, this vulnerability maps to techniques involving client-side attacks and session management compromises, making it a significant threat vector for adversaries seeking to establish persistent access within targeted organizations.