CVE-2025-64147 identifies a security vulnerability in the Jenkins Curseforge Publisher Plugin version 1.0, where API keys used for authentication with Curseforge services are displayed in plaintext on the Jenkins job configuration form. Normally, sensitive credentials like API keys should be masked or hidden to prevent exposure. This vulnerability arises because the plugin fails to mask these keys, allowing any user with access to the Jenkins job configuration page to view and potentially capture these credentials. The exposed API keys can be leveraged by attackers to impersonate legitimate users or services, potentially leading to unauthorized actions such as publishing malicious content or accessing restricted resources on Curseforge or other integrated platforms. Although no public exploits have been reported yet, the vulnerability represents a significant risk due to the sensitive nature of API keys and the common use of Jenkins in automated build and deployment pipelines. The affected version is 1.0 of the plugin, and no patch links are currently available, indicating that remediation may require vendor updates or manual mitigation steps. The vulnerability does not require user interaction beyond having access to the Jenkins UI, but it does require at least some level of authentication to the Jenkins instance. This flaw primarily impacts confidentiality but could also affect integrity and availability if attackers misuse the API keys. The lack of a CVSS score necessitates an assessment based on impact and exploitability factors.

For European organizations, this vulnerability poses a risk of credential exposure leading to unauthorized access to Curseforge services and potentially other integrated systems. Organizations using Jenkins for continuous integration and deployment that incorporate the Curseforge Publisher Plugin are at risk of having their API keys stolen if access controls are insufficient. This could result in unauthorized publishing of malicious or altered content, damaging software supply chains and organizational reputation. The breach of API keys could also facilitate lateral movement within networks if the keys grant access to further internal or cloud resources. Given the widespread use of Jenkins in European software development, especially in countries with strong tech sectors like Germany, France, and the UK, the impact could be significant. Confidentiality loss is the primary concern, but integrity and availability of software delivery processes could also be compromised. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially if attackers gain access to Jenkins UI through compromised credentials or insider threats.

Until an official patch is released, European organizations should implement strict access controls on Jenkins instances, limiting job configuration permissions to trusted administrators only. Review and audit user permissions regularly to ensure minimal necessary access. Rotate all API keys used in the Curseforge Publisher Plugin to invalidate any potentially exposed credentials. Consider using Jenkins credentials plugins or secret management tools that properly mask sensitive data instead of storing API keys in plugin configuration fields. Monitor Jenkins logs and network traffic for unusual activity related to API key usage or Curseforge publishing actions. Educate development and DevOps teams about the risk of exposing API keys in UI forms and encourage secure credential handling practices. Once a patch is available, prioritize its deployment across all affected Jenkins instances. Additionally, implement network segmentation and multi-factor authentication for Jenkins access to reduce the risk of unauthorized UI access.