CVE-2023-35155: 
Java vulnerability analysis and mitigation

CVE-2023-35155 is a reflected cross-site scripting (XSS) vulnerability discovered in XWiki Platform, a generic wiki platform offering runtime services for applications. The vulnerability was disclosed on June 20, 2023, affecting versions from 2.6 RC2 and 2.7 RC1 onwards, and has been patched in versions 15.0-rc-1, 14.10.4, and 14.4.8 (GitHub Advisory).

The vulnerability allows users to forge a URL with a payload that enables JavaScript injection in the page. The attack vector is through the target parameter in the share page by email functionality. The vulnerability has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:L, indicating network accessibility, low attack complexity, no privileges required, and user interaction required (GitHub Advisory, NVD).

If exploited, the vulnerability allows attackers to execute arbitrary JavaScript code in users' browsers. This can lead to performing any action within the application that the user can perform, viewing any information accessible to the user, and modifying any information that the user has permission to modify (XWiki Jira).

The vulnerability can be exploited by crafting a specific URL that includes malicious JavaScript code in the target parameter. A proof of concept demonstrates that when a user visits the crafted URL, the XSS payload triggers automatically, executing arbitrary JavaScript code in the context of the user's browser session (XWiki Jira).

The vulnerability has been patched in XWiki versions 15.0-rc-1, 14.10.4, and 14.4.8. The fix primarily impacts Velocity templates and page contents. Users are advised to upgrade to these patched versions to protect against this vulnerability (GitHub Advisory).

The vulnerability was initially reported on Intigriti by René de Sain (@renniepak), demonstrating the effectiveness of the bug bounty program in identifying security issues (GitHub Advisory).