What is xss?
XSS (Cross-Site Scripting) attack is a security vulnerability in web applications where malicious scripts are executed by other users.
Azərbaycanca: XSS (Cross-Site Scripting) hücumu - zərərli skriptlərin digər istifadəçilər tərəfindən icra olunduğu veb tətbiqlərindəki təhlükəsizlik zəifliyidir.
How it works
XSS attacks occur when malicious JavaScript code is injected into a vulnerable web page and executed in the browsers of other users. This can lead to theft of user data, session hijacking, and other malicious activities.
Defense checklist5
- 01
Input validation and sanitization should be implemented.
- 02
Special libraries should be used to detect malicious code in user inputs.
- 03
The web application should adhere to secure coding practices.
- 04
Security updates and patches should be applied in a timely manner.
- 05
Security audits and penetration testing should be conducted regularly.
Real-world evidence
XSS vulnerabilities have been identified in various web applications, including Grav (CVE-2026-64628), FOG (CVE-2026-47689), Joomla Extension - joomshopping.com (CVE-2026-63264), Breakdance (CVE-2026-57735), Coaching (CVE-2026-57397), and others.
Sources
- CVE-2026-64628: Grav contains a stored cross-site scripting vulnerability in shortcode-core attribute handnvd
- Zimbra Patches Critical SNMP Command Injection and Four XSS Vulnerabilitieshackernews
- CVE-2026-47689: FOG is a free open-source cloning/imaging/rescue suite/inventory management system. Priornvd
- CVE-2026-63264: Joomla Extension - joomshopping.com - Reflective XSS in JoomShopping < 5.9.3 - The Joomlanvd
- CVE-2026-65756: Joomla Extension - regularlabs.com - XSS vector in Keyboard Shortcuts extension - Shortcutnvd
- CVE-2026-57735: Unauthenticated Cross Site Scripting (XSS) in Breakdance <= 2.7.1 versions.nvd
- CVE-2026-57397: Unauthenticated Cross Site Scripting (XSS) in Coaching <= 3.9.2 versions.nvd
- CVE-2026-57699: Subscriber Cross Site Scripting (XSS) in Slider Pro <= 4.8.13 versions.nvd
- CVE-2026-57428: Unauthenticated Cross Site Scripting (XSS) in Sprout Clients <= 3.2.3 versions.nvd
- CVE-2026-57701: Unauthenticated Cross Site Scripting (XSS) in Real Estate Manager Pro <= 12.8.5 versions.nvd
- CVE-2026-24628: Administrator Cross Site Scripting (XSS) in Photo Gallery by Supsystic <= 1.16.3 versions.nvd
- CVE-2026-65898: DOMPurify before 3.4.11 fails to clone the ALLOWED_ATTR allowlist when setConfig() is usednvd
Other attack types
See also6
This guide is AI-written from the real incident sources skopnix collected — the examples above are drawn from those cited items, nothing is invented.