CVE-2025-14198 is a medium-severity information disclosure vulnerability affecting Verysync 微力同步 version 2.21.3, a software product that includes a Web Administration Module. The vulnerability resides in an unspecified function related to the /safebrowsing/clientreport/download endpoint, which accepts a 'key' parameter (notably 'dummytoken' in the reported case). By manipulating requests to this endpoint, an unauthenticated remote attacker can cause the system to disclose information that should remain confidential. The vulnerability does not require authentication, user interaction, or elevated privileges, making it easier to exploit remotely over the network. The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P) indicates low complexity and no privileges or interaction needed, but the impact is limited to confidentiality with no integrity or availability effects. The vendor was contacted but has not responded, and no patches or mitigations have been published, while exploit code is publicly available, increasing the risk of exploitation. This vulnerability could expose sensitive configuration or operational data, potentially aiding further attacks or reconnaissance. Organizations using Verysync 2.21.3 should consider this a significant risk, especially in environments where confidentiality is critical.

For European organizations, this vulnerability poses a risk of unauthorized disclosure of sensitive information managed or stored by Verysync 2.21.3 installations. Such information could include configuration details, client reports, or other operational data accessible via the vulnerable endpoint. Disclosure could facilitate further targeted attacks, espionage, or data leakage incidents, undermining confidentiality obligations under regulations such as GDPR. The remote, unauthenticated nature of the exploit increases the attack surface, especially for internet-facing deployments. While no active exploitation is currently reported, the public availability of exploit code raises the likelihood of opportunistic attacks. Organizations in sectors with high data sensitivity—such as finance, healthcare, government, and critical infrastructure—are particularly at risk. The lack of vendor response and patch availability means organizations must rely on compensating controls to reduce exposure. Failure to address this vulnerability could result in reputational damage, regulatory penalties, and operational disruptions if sensitive data is leaked or used maliciously.

1. Immediately audit all Verysync 2.21.3 deployments to identify exposed instances, especially those accessible from untrusted networks. 2. Restrict network access to the Web Administration Module and specifically the /safebrowsing/clientreport/download endpoint using firewalls, VPNs, or IP whitelisting to limit exposure to trusted users only. 3. Implement web application firewalls (WAF) with custom rules to detect and block suspicious requests targeting the vulnerable endpoint or unusual 'key' parameter values. 4. Monitor logs and network traffic for anomalous access patterns or repeated requests to the vulnerable URL to detect potential exploitation attempts. 5. If possible, disable or restrict the affected Web Administration Module functionality until a vendor patch or update is available. 6. Engage with Verysync vendor or community channels to seek updates or unofficial patches and report any exploitation attempts. 7. Educate security teams about this vulnerability and ensure incident response plans include steps for information disclosure incidents. 8. Consider network segmentation to isolate Verysync servers from critical data stores and sensitive environments. 9. Regularly review and update access controls and credentials associated with Verysync to minimize risk from compromised accounts. 10. Prepare for rapid deployment of patches once the vendor releases a fix.