CVE-2025-60181 is a Server-Side Request Forgery (SSRF) vulnerability identified in the Silencesoft RSS Reader product developed by silence. SSRF vulnerabilities occur when an attacker can manipulate a server to make HTTP requests to arbitrary domains or internal systems, potentially bypassing network access controls. In this case, the vulnerability affects Silencesoft RSS Reader versions up to 0.6, with no specific earliest affected version noted. The vulnerability allows an unauthenticated attacker to induce the RSS Reader server to send crafted requests to internal or external resources. The CVSS 3.1 base score is 5.4 (medium severity), reflecting that the attack vector is network-based (AV:N), requires high attack complexity (AC:H), no privileges (PR:N), and no user interaction (UI:N). The scope is changed (S:C), meaning the vulnerability can affect resources beyond the vulnerable component. The impact on confidentiality and integrity is low (C:L, I:L), with no impact on availability (A:N). No known exploits are currently reported in the wild, and no patches have been published yet. SSRF vulnerabilities can be leveraged to access internal services, perform port scanning, or exfiltrate data from internal networks, depending on the server's network environment and configuration. Given the nature of RSS readers, which fetch and parse external feeds, the vulnerability likely arises from insufficient validation or sanitization of URLs used by the application to retrieve RSS content. This can allow attackers to specify malicious URLs that trigger the SSRF behavior.

For European organizations using Silencesoft RSS Reader, this SSRF vulnerability poses a moderate risk. If exploited, attackers could leverage the vulnerability to access internal network resources that are otherwise inaccessible from the internet, potentially leading to information disclosure or further internal reconnaissance. This could be particularly impactful for organizations with sensitive internal services behind firewalls, such as intranet portals, internal APIs, or cloud metadata services. Although the CVSS score indicates low confidentiality and integrity impact, the changed scope suggests that the vulnerability could affect systems beyond the RSS Reader itself, increasing the risk surface. The lack of authentication requirement and user interaction means exploitation could be automated and performed remotely. However, the high attack complexity implies that exploitation may require specific conditions or knowledge about the target environment, somewhat limiting widespread exploitation. European organizations in sectors such as finance, government, healthcare, and critical infrastructure that rely on RSS feeds for threat intelligence, news aggregation, or internal communications could be targeted to gain internal network access or gather intelligence. The absence of known exploits in the wild currently reduces immediate risk but does not preclude future exploitation once proof-of-concept code or exploit tools become available.

Given no patches are currently available, European organizations should implement specific mitigations to reduce risk from this SSRF vulnerability. First, restrict the network egress permissions of the Silencesoft RSS Reader server to only allow outbound connections to trusted RSS feed sources, blocking access to internal IP ranges and sensitive endpoints such as cloud metadata services (e.g., 169.254.169.254). Second, implement strict input validation and URL filtering on RSS feed URLs, ensuring only legitimate and whitelisted domains are accepted. Third, deploy web application firewalls (WAFs) with rules to detect and block SSRF attack patterns targeting the RSS Reader. Fourth, monitor logs for unusual outbound requests initiated by the RSS Reader, especially those targeting internal IP addresses or uncommon ports. Fifth, consider isolating the RSS Reader in a segmented network zone with limited access to internal resources. Finally, maintain awareness of vendor updates and apply patches promptly once released. If feasible, temporarily discontinue use of the vulnerable RSS Reader until a fix is available or replace it with alternative software that does not exhibit this vulnerability.