CVE-2025-46435 is a Cross-Site Request Forgery (CSRF) vulnerability identified in the Yash Binani Time Based Greeting application, affecting versions up to 2.2.2. The vulnerability allows an attacker to perform unauthorized actions on behalf of an authenticated user without their consent. Specifically, this CSRF flaw can be leveraged to inject stored Cross-Site Scripting (XSS) payloads into the application. Stored XSS occurs when malicious scripts are permanently stored on the target server, for example, in a database, and then executed in the context of other users' browsers when they access the affected content. The combination of CSRF and stored XSS significantly elevates the risk, as an attacker can trick an authenticated user into submitting a crafted request that stores malicious scripts, which then execute in the context of other users, potentially leading to session hijacking, credential theft, or unauthorized actions within the application. The vulnerability does not require user interaction beyond the victim visiting a malicious page or clicking a crafted link, and it exploits the lack of proper CSRF protections such as anti-CSRF tokens or same-site cookie attributes. No patches or fixes have been published at the time of this report, and no known exploits are currently observed in the wild. The vulnerability is categorized under CWE-352, which highlights weaknesses in CSRF protections. The affected product, Time Based Greeting by Yash Binani, is a web-based application that presumably customizes greetings based on time, likely used in web portals or internal tools. The absence of a CVSS score necessitates an independent severity assessment, which is provided below.

For European organizations, the impact of this vulnerability can be significant depending on the deployment context of the Time Based Greeting application. If used in internal portals, customer-facing websites, or intranet tools, exploitation could lead to unauthorized actions performed under legitimate user credentials, undermining trust and potentially exposing sensitive user data. The stored XSS component could enable attackers to steal session cookies, perform privilege escalation, or distribute malware via the affected application. This could lead to data breaches, reputational damage, and compliance violations under regulations such as GDPR. Additionally, if the application is integrated with other enterprise systems, the attack surface broadens, potentially allowing lateral movement within networks. Although no known exploits exist yet, the vulnerability’s nature suggests it could be weaponized by attackers targeting European entities, especially those with less mature web application security practices. The medium severity rating indicates moderate risk, but the combined CSRF and stored XSS vector increases the potential impact beyond typical CSRF issues.

Implement anti-CSRF tokens in all state-changing requests within the Time Based Greeting application to ensure that requests originate from legitimate users. Adopt the SameSite cookie attribute (preferably 'Strict' or 'Lax') for session cookies to reduce the risk of CSRF attacks via cross-site requests. Sanitize and validate all user inputs rigorously to prevent stored XSS payloads from being saved and executed. Conduct a thorough code review and security audit of the Time Based Greeting application focusing on input handling and session management. Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in the browser context. Monitor web application logs for unusual POST requests or suspicious parameter values that could indicate exploitation attempts. Educate users about the risks of clicking on untrusted links, especially when authenticated to sensitive applications. If possible, isolate the Time Based Greeting application environment to limit the impact of any successful exploitation. Engage with the vendor (Yash Binani) to request patches or updates addressing this vulnerability and apply them promptly once available.