CVE-2025-47635 is a Server-Side Request Forgery (SSRF) vulnerability identified in the WPWebinarSystem's WebinarPress plugin, affecting versions up to 1.33.27. SSRF vulnerabilities occur when an attacker can abuse a server functionality to make HTTP requests to arbitrary domains or internal systems, potentially bypassing network access controls. In this case, WebinarPress allows an authenticated user with high privileges to trigger server-side requests to arbitrary URLs. The vulnerability is classified under CWE-918, indicating improper restriction of URLs in SSRF. The CVSS 3.1 base score is 5.5 (medium severity), with the vector AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N, meaning the attack can be performed remotely over the network with low attack complexity but requires high privileges and no user interaction. The impact affects confidentiality and integrity, as an attacker could leverage SSRF to access internal resources, potentially exfiltrate sensitive data or manipulate internal services. However, availability is not impacted. The scope is changed, indicating that the vulnerability affects components beyond the initially vulnerable module. No known exploits are currently reported in the wild, and no patches have been published yet. The vulnerability was published on May 7, 2025, and has been enriched by CISA, highlighting its relevance. Since WebinarPress is a WordPress plugin used for hosting webinars, the vulnerability could be exploited in environments where the plugin is installed and the attacker has high-level access, such as administrator accounts.

For European organizations, the SSRF vulnerability in WebinarPress poses a moderate risk. Organizations using WebinarPress for hosting webinars, especially those handling sensitive or confidential information, could face unauthorized internal network access or data leakage. The SSRF could be used to pivot into internal systems, bypassing firewalls or network segmentation, which is particularly concerning for organizations with strict data protection requirements under GDPR. The confidentiality and integrity of internal services and data could be compromised, leading to potential regulatory penalties and reputational damage. However, since exploitation requires high privileges, the risk is somewhat mitigated by proper access controls. Still, insider threats or compromised administrator accounts could enable exploitation. The lack of known exploits in the wild currently reduces immediate risk but does not eliminate it. Organizations relying on WebinarPress for critical communications or customer engagement may experience operational disruptions if internal systems are impacted indirectly through SSRF exploitation.

European organizations should take proactive steps to mitigate this vulnerability: 1) Immediately audit and restrict administrator-level access to WebinarPress to trusted personnel only, minimizing the risk of privilege abuse. 2) Monitor and log all administrative actions within WordPress and WebinarPress to detect unusual request patterns indicative of SSRF exploitation attempts. 3) Implement network-level controls such as egress filtering and internal firewall rules to restrict the WebinarPress server's ability to make arbitrary outbound HTTP requests, limiting SSRF impact. 4) Employ Web Application Firewalls (WAFs) with custom rules to detect and block suspicious SSRF-related payloads targeting WebinarPress endpoints. 5) Regularly update and patch WebinarPress once a vendor fix becomes available; until then, consider disabling or limiting the plugin's functionality if feasible. 6) Conduct internal penetration testing focusing on SSRF vectors to identify and remediate any additional weaknesses. 7) Educate administrators on the risks of SSRF and enforce strong authentication and session management to reduce the likelihood of credential compromise.