CVE-2025-58794 is a Cross-Site Request Forgery (CSRF) vulnerability identified in the 'Notification for Telegram' plugin developed by rainafarai, affecting versions up to and including 3.4.6. CSRF vulnerabilities occur when an attacker tricks an authenticated user into submitting a forged request to a web application without their consent, exploiting the user's active session and privileges. In this case, the vulnerability allows an attacker to induce a victim to perform unintended actions within the Notification for Telegram plugin, potentially altering its behavior or configuration. The CVSS 3.1 base score of 4.3 (medium severity) reflects that the attack vector is network-based (AV:N), requires no privileges (PR:N), but does require user interaction (UI:R). The impact is limited to integrity (I:L) with no confidentiality (C:N) or availability (A:N) impact. The scope remains unchanged (S:U), meaning the vulnerability affects only the vulnerable component without extending to other system components. No known exploits are currently reported in the wild, and no patches have been linked yet. The vulnerability stems from improper validation of requests, allowing attackers to craft malicious web requests that, when executed by an authenticated user, can manipulate the plugin's settings or trigger unauthorized actions. This can lead to unauthorized changes in notification configurations, potentially disrupting alerting mechanisms or causing misinformation through Telegram notifications.

For European organizations, the impact of this vulnerability primarily concerns the integrity of notification workflows that rely on the Notification for Telegram plugin. Organizations using this plugin to automate alerts or critical notifications may face risks of unauthorized configuration changes, leading to missed alerts or false notifications. This can affect operational awareness, incident response, and communication efficiency. While the vulnerability does not directly compromise confidentiality or availability, the manipulation of notification settings can indirectly hinder timely responses to security events or operational issues. Sectors with high reliance on automated alerting—such as finance, healthcare, critical infrastructure, and government agencies—may experience operational disruptions or reduced situational awareness. Additionally, organizations with strict compliance requirements around auditability and notification integrity may face regulatory scrutiny if such vulnerabilities are exploited. Given the medium severity and the requirement for user interaction, the threat is moderate but should not be underestimated, especially in environments where users have elevated privileges or where the plugin is widely deployed.

To mitigate this CSRF vulnerability effectively, European organizations should: 1) Immediately verify if their systems use the Notification for Telegram plugin version 3.4.6 or earlier and plan for an upgrade once a patch is released. 2) Implement strict CSRF protections at the web application level, such as enforcing anti-CSRF tokens on all state-changing requests related to the plugin. 3) Employ Content Security Policy (CSP) headers and SameSite cookie attributes to reduce the risk of cross-origin request forgery. 4) Restrict access to the plugin's administrative interfaces to trusted networks and authenticated users with minimal necessary privileges. 5) Monitor logs for unusual configuration changes or unexpected notification behavior that could indicate exploitation attempts. 6) Educate users about the risks of clicking on untrusted links or visiting suspicious websites while authenticated to systems using this plugin. 7) Consider deploying web application firewalls (WAFs) with custom rules to detect and block suspicious CSRF attack patterns targeting the plugin. 8) Maintain an incident response plan that includes steps to verify notification integrity and recover from unauthorized changes. These measures, combined with timely patching once available, will significantly reduce the risk posed by this vulnerability.