CVE-2025-13068 is a stored Cross-Site Scripting (XSS) vulnerability identified in the milmor Telegram Bot & Channel plugin for WordPress, affecting all versions up to and including 4.1. The vulnerability stems from improper neutralization of input during web page generation, specifically the Telegram username field, which is not adequately sanitized or escaped before being rendered on web pages. This allows unauthenticated attackers to inject arbitrary JavaScript code that is stored persistently and executed in the browsers of users who visit the affected pages. The vulnerability is categorized under CWE-79, a common and dangerous web application weakness. The CVSS v3.1 base score is 7.2, reflecting a network attack vector with low attack complexity, no privileges required, no user interaction needed, and a scope change due to the potential for script execution in other users' contexts. The impact includes potential theft of user credentials, session tokens, or other sensitive information, as well as the ability to perform actions on behalf of users or redirect them to malicious sites. Despite no known exploits currently in the wild, the vulnerability poses a significant risk due to the widespread use of WordPress and the popularity of Telegram integrations. The plugin's failure to sanitize input properly highlights a critical security oversight that must be addressed promptly.

The exploitation of this stored XSS vulnerability can have severe consequences for organizations using the milmor Telegram Bot & Channel plugin. Attackers can execute arbitrary scripts in the context of legitimate users, leading to credential theft, session hijacking, and unauthorized actions within the affected website. This can result in data breaches, defacement, loss of user trust, and potential regulatory penalties. Since the vulnerability requires no authentication or user interaction, it can be exploited at scale by automated tools, increasing the risk of widespread compromise. Organizations with high-traffic websites or those handling sensitive user data are particularly vulnerable. Additionally, the scope of impact extends beyond the compromised site, as attackers can leverage the vulnerability to deliver malware, conduct phishing campaigns, or pivot to internal networks. The lack of a patch at the time of disclosure further elevates the risk, necessitating immediate mitigation efforts.

1. Immediate mitigation should include disabling or removing the milmor Telegram Bot & Channel plugin until a security patch is released. 2. If removal is not feasible, implement Web Application Firewall (WAF) rules to detect and block malicious payloads targeting the Telegram username input field. 3. Employ input validation and output encoding on all user-supplied data, especially the Telegram username, to neutralize potentially malicious scripts. 4. Monitor web server logs and user reports for signs of XSS exploitation attempts or unusual activity. 5. Educate site administrators and developers on secure coding practices, emphasizing the importance of sanitizing and escaping user inputs. 6. Once a patch is available, apply it promptly and verify the fix through security testing. 7. Consider implementing Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts. 8. Regularly audit all third-party plugins for vulnerabilities and maintain an up-to-date inventory to quickly respond to emerging threats.