CVE-2025-5512 is a vulnerability identified in the quequnlong shiyi-blog software, specifically affecting versions 1.2.0 and 1.2.1. The flaw resides in an unspecified function within the /api/sys/user/verifyPassword/ endpoint of the Administrator Backend component. This vulnerability results in improper authentication, allowing an attacker to bypass normal authentication mechanisms remotely without requiring any privileges or user interaction. The vulnerability is classified as medium severity with a CVSS 4.0 base score of 6.9, reflecting a network attack vector with low complexity and no need for authentication or user interaction. The impact on confidentiality, integrity, and availability is rated as low, indicating that while unauthorized access is possible, the extent of damage or data exposure may be limited. The vendor was notified early but did not respond or provide a patch, and no known exploits are currently observed in the wild. The vulnerability allows attackers to potentially gain unauthorized administrative access to the blog platform, which could lead to unauthorized content modification, data leakage, or further pivoting within the affected environment. The lack of authentication and user interaction requirements increases the risk of automated exploitation attempts. However, the absence of a public patch and exploit in the wild suggests limited immediate exploitation, though the public disclosure may increase future risk.

For European organizations using quequnlong shiyi-blog versions 1.2.0 or 1.2.1, this vulnerability poses a risk of unauthorized administrative access, potentially compromising the confidentiality and integrity of blog content and user data. Organizations relying on this platform for internal or external communications could face reputational damage, data breaches, or service disruptions. Given the remote exploitation capability without authentication, attackers could automate attacks to gain control over administrative functions. This could facilitate further attacks such as defacement, data exfiltration, or deployment of malicious code. The medium severity rating suggests that while the vulnerability is serious, the overall impact might be limited by the scope of the affected component and the absence of direct availability impact. However, the lack of vendor response and patch availability increases the risk for European entities, especially those with limited security monitoring or patch management capabilities. Organizations in regulated sectors (e.g., finance, healthcare) may face compliance risks if sensitive data is exposed or integrity compromised.

1. Immediate mitigation should include restricting network access to the /api/sys/user/verifyPassword/ endpoint to trusted IP addresses or internal networks only, using firewalls or web application firewalls (WAFs). 2. Implement additional authentication layers such as IP whitelisting, VPN access, or multi-factor authentication (MFA) around the administrative backend to reduce exposure. 3. Monitor logs for unusual authentication attempts or access patterns targeting the vulnerable endpoint. 4. If feasible, disable or limit the use of the affected API endpoint until a patch or vendor guidance is available. 5. Conduct a thorough security review of the shiyi-blog deployment, including user account privileges and audit trails, to detect any unauthorized access. 6. Engage with the vendor or community for updates or unofficial patches and consider migrating to alternative blogging platforms with active security support. 7. Prepare incident response plans to quickly address potential exploitation events. 8. Regularly update and patch all software components once a fix is released.