CVE-2025-53650 is a vulnerability identified in the Jenkins Credentials Binding Plugin, specifically in versions 687.v619cb_15e923f and earlier. The plugin is designed to securely inject credentials into Jenkins build environments, masking sensitive information to prevent exposure. However, due to improper masking, credentials that appear in exception error messages are logged in plaintext within the build logs. This flaw allows sensitive secrets such as passwords, API tokens, or SSH keys to be exposed to anyone with access to these logs. The vulnerability has a CVSS 3.1 base score of 7.3, indicating high severity, with an attack vector of network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), and impacts on confidentiality, integrity, and availability (C:L/I:L/A:L). The scope remains unchanged (S:U), meaning the impact is confined to the vulnerable component. Exploitation does not require authentication or user interaction, making it easier for attackers to leverage this flaw remotely. Although no known exploits have been reported in the wild, the risk of credential leakage can lead to unauthorized access to Jenkins environments, enabling further attacks such as pipeline manipulation, code injection, or lateral movement within networks. The vulnerability affects Jenkins installations using the Credentials Binding Plugin, a common tool in continuous integration and continuous deployment (CI/CD) workflows. The lack of proper masking in error logs undermines the security model of credential handling in Jenkins, posing a significant threat to organizations relying on automated build and deployment processes.

For European organizations, this vulnerability poses a significant risk to the confidentiality of sensitive credentials used in CI/CD pipelines. Exposure of credentials in build logs can lead to unauthorized access to source code repositories, deployment environments, and other critical infrastructure. This can result in code tampering, data breaches, service disruptions, and potential compliance violations under regulations such as GDPR. The integrity of software builds may be compromised, leading to the deployment of malicious or altered code. Availability may also be affected if attackers disrupt build processes or infrastructure. Organizations with extensive DevOps practices and automated pipelines are particularly vulnerable, as the compromise of Jenkins credentials can cascade into broader network and application-level attacks. The risk is amplified by the fact that exploitation requires no authentication or user interaction, making it feasible for remote attackers to extract credentials if they can access build logs. This vulnerability could also undermine trust in software supply chains, a critical concern in Europe given recent emphasis on software security and supply chain integrity.

1. Immediately update the Jenkins Credentials Binding Plugin to the latest patched version once it is released by the Jenkins Project. 2. Restrict access to Jenkins build logs to only trusted personnel and systems, implementing strict role-based access controls (RBAC). 3. Regularly audit build logs for any accidental exposure of credentials and rotate any credentials found to be leaked. 4. Implement centralized logging with secure storage and monitoring to detect unusual access patterns to build logs. 5. Use environment variables or secret management tools that integrate securely with Jenkins to minimize direct credential exposure. 6. Educate development and DevOps teams about the risks of credential leakage and enforce best practices for secret handling. 7. Consider isolating Jenkins build environments and limiting network access to reduce the blast radius in case of compromise. 8. Monitor Jenkins security advisories and subscribe to vulnerability feeds to ensure timely awareness of patches and related threats.