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nexus-repository

Due to a regression introduced in version 3.83.0, a security header is no longer applied to certain user-uploaded content served from repositories. This may allow an authenticated attacker with repository upload privileges to exploit a stored cross-site scripting (XSS) vulnerability with user context.

CVE-2025-13488 is a stored cross-site scripting (XSS) vulnerability identified in Sonatype Nexus Repository version 3.83.0. This vulnerability arises due to a regression introduced in this version where a critical security header, which previously helped prevent script execution in user-uploaded content, is no longer applied to certain repository-served files. As a result, an authenticated attacker who has repository upload privileges can embed malicious JavaScript code within uploaded content. When other users access this content through the repository interface, the malicious script executes in their browser context, potentially allowing the attacker to hijack sessions, steal credentials, or perform unauthorized actions on behalf of the victim. The vulnerability is classified under CWE-79, indicating improper neutralization of input during web page generation. Exploitation requires the attacker to be authenticated with upload rights and relies on user interaction to trigger the malicious script, which limits the attack surface but does not eliminate risk, especially in environments with multiple collaborators and automated processes that may access repository content. The CVSS 4.0 base score is 5.1 (medium severity), reflecting network attack vector, low attack complexity, no privileges required beyond upload rights, and user interaction needed. No public exploits or active exploitation in the wild have been reported to date. The vulnerability highlights the importance of maintaining security headers and input sanitization in web applications that serve user-generated content, especially in software development tools widely used in enterprise environments.

Detailed information about CVE-2025-13488: CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') in Sonatype Nexus 

CVE-2025-13488: CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') in Sonatype Nexus Repository - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2025-13488: CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') in Sonatype Nexus Repository

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