CVE-2023-2813: 
NixOS vulnerability analysis and mitigation

CVE-2023-2813 is a Reflected Cross-Site Scripting (XSS) vulnerability affecting multiple WordPress themes. The vulnerability was discovered on August 14, 2023, and affects over 40 different WordPress themes including aapna, anand, anfaust, and others. The vulnerability exists in the search box functionality where search results are reflected without proper sanitization (WPScan).

The vulnerability is classified as a Cross-Site Scripting (XSS) issue with a CVSS score of 6.1 (MEDIUM) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. The vulnerability exists in the search box functionality where user input is reflected in the search results without proper sanitization. An example proof of concept URL pattern is https://example.com/?s=katana/asd/ (NVD, WPScan).

The vulnerability allows an unauthenticated attacker to execute arbitrary JavaScript code in the context of other users' browsers when they click on a malicious link. This could lead to theft of sensitive information, session hijacking, or other client-side attacks (WPScan).

Several affected themes have released fixes: arendelle (1.1.13), bazaar-lite (1.8.6), bunnypresslite (2.1), cafe-bistro (1.1.4), college (1.5.1), directory (3.0.2), drop (1.22), everse (1.2.4), fullbase (1.2.1), ilex (1.4.2), kata (1.2.9), looki-lite (1.3.0), nokke (1.2.4), pinzolo (1.2.10), plato (1.1.9), restaurant-pt (1.1.3), saul (1.1.0), sean-lite (1.4.6), venice-lite (1.5.5), viburno (1.3.2), wedding-bride (1.0.2), and wlow (1.2.7). Users of affected themes should update to the fixed versions (WPScan).