CVE-2025-9151 is a medium-severity security vulnerability affecting LiuYuYang01's ThriveX-Blog software versions up to 3.1.7. The flaw resides in the function updateJsonValueByName within the file /web_config/json/name/web. This function suffers from improper authorization, allowing an attacker to manipulate it remotely without proper permission checks. The vulnerability enables unauthorized users to perform actions that should be restricted, potentially altering configuration or data values within the blog platform. The vulnerability is remotely exploitable without requiring user interaction or prior authentication, which increases its risk profile. Although the vendor was notified early, no response or patch has been issued, and a public exploit has been released, increasing the likelihood of exploitation. The CVSS 4.0 base score is 5.3, reflecting a medium severity with network attack vector, low complexity, no authentication required, and limited impact on confidentiality, integrity, and availability. The vulnerability does not require user interaction and affects the confidentiality, integrity, and availability of the system to a limited extent. The lack of vendor response and public exploit availability make this a notable risk for organizations using ThriveX-Blog versions 3.1.0 through 3.1.7.

For European organizations using ThriveX-Blog, this vulnerability could lead to unauthorized changes in blog configurations or content, potentially resulting in data integrity issues, defacement, or exposure of sensitive configuration data. Although the impact on confidentiality and availability is limited, unauthorized manipulation could disrupt normal operations or damage the organization's reputation. Since the exploit is remotely executable without authentication, attackers could leverage this flaw to compromise multiple installations rapidly. This is particularly concerning for organizations relying on ThriveX-Blog for public-facing content or internal communications, as unauthorized changes could undermine trust or leak sensitive information. The absence of a vendor patch increases the risk of exploitation, especially as public exploit code is available. European entities with web infrastructure running this software should consider the risk of targeted or opportunistic attacks exploiting this vulnerability.

Given the lack of an official patch, European organizations should implement the following specific mitigations: 1) Immediately audit all ThriveX-Blog instances to identify affected versions (3.1.0 to 3.1.7). 2) Restrict network access to the blog management interfaces by implementing IP whitelisting or VPN-only access to reduce exposure to remote attackers. 3) Employ web application firewalls (WAFs) with custom rules to detect and block suspicious requests targeting the updateJsonValueByName function or related endpoints. 4) Monitor logs for unusual activity indicative of exploitation attempts, such as unauthorized JSON manipulation requests. 5) Consider isolating or disabling the vulnerable function if feasible, or temporarily migrating to alternative blogging platforms until a vendor patch is released. 6) Engage in active threat hunting for signs of compromise related to this vulnerability. 7) Maintain regular backups of blog content and configuration to enable rapid recovery if exploitation occurs. These targeted steps go beyond generic advice by focusing on access control, detection, and containment specific to the vulnerability's characteristics.