Key Information Summary Vulnerability Overview Vulnerability Type: Reflected XSS (Cross-Site Scripting) Affected Version: Vywweb CMS v1.0.7.2 Discovery Date: August 10, 2023 Public Disclosure Date: August 25, 2023 Vulnerability Details Description: A reflected XSS vulnerability exists in the email and password fields of the login form. When users input data containing malicious scripts, this data is directly returned to the user's browser and executed. Impact: Attackers can exploit this vulnerability to inject malicious scripts, leading to credential theft, session hijacking, and webpage defacement. Attack Vector Attack Method: By injecting malicious scripts into the email or password fields of the login form, attackers can trigger an XSS attack. Example Payloads: - Email field: 一 Password field: Impact Credential Theft: Attackers can steal users' usernames and passwords. Session Hijacking: Attackers can use stolen session tokens to perform further attacks. Webpage Defacement and Phishing: Attackers can modify the content of the login page to conduct phishing attacks. Mitigation Measures Input Validation: Implement strict validation and filtering of user input to ensure only expected data formats are accepted. Output Encoding: Properly HTML-encode all user-supplied data before rendering it in the browser to prevent malicious script execution. Disclosure Timeline Discovery Date: August 10, 2023 Vendor Confirmation Date: August 15, 2023 Vendor Fix Date: August 20, 2023 Public Disclosure Date: August 25, 2023