CVE-2025-29155 is a medium-severity vulnerability affecting the petstore application version 1.0.7. The vulnerability allows a remote attacker to execute arbitrary code via the DELETE HTTP endpoint. The root cause is linked to improper handling of input in this endpoint, classified under CWE-77 (Improper Neutralization of Special Elements used in a Command ('Command Injection')). This means that the application likely fails to properly sanitize or validate user-supplied input before incorporating it into system commands or scripts, enabling an attacker to inject and execute malicious commands remotely without authentication or user interaction. The CVSS 3.1 base score is 6.5, reflecting a network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), unchanged scope (S:U), and low impact on confidentiality and integrity (C:L/I:L) with no impact on availability (A:N). Although no known exploits are reported in the wild yet, the vulnerability's presence in a publicly accessible DELETE endpoint exposes it to potential exploitation by attackers scanning for vulnerable petstore instances. The lack of available patches or mitigation links suggests that the vendor has not yet released an official fix, increasing the urgency for organizations to implement compensating controls or monitor for suspicious activity.

For European organizations using petstore v1.0.7, this vulnerability poses a risk of remote code execution that could lead to unauthorized access or manipulation of application data and potentially the underlying system. While the CVSS score indicates a medium severity with limited confidentiality and integrity impact, the ability to execute arbitrary code remotely without authentication could be leveraged as a foothold for further attacks, lateral movement, or data exfiltration. Organizations in sectors with stringent data protection requirements (e.g., finance, healthcare, government) could face compliance risks if this vulnerability is exploited. Additionally, the DELETE endpoint is typically used for resource removal, so exploitation could also result in unauthorized deletion or modification of critical data. Given the lack of known exploits, the immediate risk may be moderate, but the potential for rapid weaponization exists, especially if attackers develop automated tools targeting this flaw. European organizations should be vigilant, especially those with externally facing petstore deployments or integrated supply chain dependencies involving this software.

Since no official patch is currently available, European organizations should implement the following specific mitigations: 1) Restrict access to the DELETE endpoint using network-level controls such as firewalls or API gateways to limit exposure only to trusted IP addresses or internal networks. 2) Employ Web Application Firewalls (WAFs) with custom rules to detect and block command injection patterns targeting the DELETE endpoint. 3) Conduct thorough input validation and sanitization on all user inputs, especially those reaching system commands, to prevent injection attacks. 4) Monitor application logs and network traffic for unusual DELETE requests or suspicious command execution attempts. 5) If possible, disable or temporarily remove the DELETE endpoint until a patch is released. 6) Implement strict least-privilege principles for the application process to minimize the impact of any successful code execution. 7) Prepare incident response plans specific to remote code execution scenarios to enable rapid containment and remediation. 8) Stay updated with vendor advisories and apply patches immediately once available.