CVE-2025-53667 identifies a security weakness in the Jenkins Dead Man's Snitch Plugin version 0.1, where the plugin fails to mask sensitive Dead Man's Snitch tokens on the job configuration form within the Jenkins UI. Dead Man's Snitch tokens are used to monitor job execution and alert on failures or missed runs. By displaying these tokens in clear text, the plugin exposes them to anyone with access to the Jenkins job configuration page, increasing the risk of token theft. The vulnerability is classified under CWE-522, which relates to insufficiently protected credentials. The CVSS v3.1 base score is 5.3 (medium severity) with vector AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N, indicating that the vulnerability is remotely exploitable without privileges or user interaction but only impacts confidentiality. The exposure of tokens could allow attackers to spoof monitoring signals or disable alerts, potentially masking operational issues. No patches or fixes are currently available, and no exploits have been reported in the wild. The issue primarily affects Jenkins installations running the Dead Man's Snitch Plugin version 0.1, which may be used in continuous integration and deployment pipelines.

For European organizations, this vulnerability poses a confidentiality risk by exposing monitoring tokens that could be leveraged to interfere with job monitoring and alerting systems. While it does not directly compromise system integrity or availability, attackers who obtain these tokens might suppress alerts or create false positives, leading to undetected failures in critical CI/CD pipelines. This could delay incident response or cause operational disruptions indirectly. Organizations in sectors relying heavily on automated build and deployment processes, such as finance, telecommunications, and manufacturing, may face increased risk. Additionally, organizations with stringent compliance requirements around credential management and monitoring integrity could be impacted. The vulnerability's exploitation requires access to the Jenkins UI, so organizations with weak access controls or exposed Jenkins instances are at higher risk.

To mitigate this vulnerability, European organizations should immediately restrict access to Jenkins job configuration pages to trusted personnel only, using strong authentication and role-based access controls. Network-level protections such as VPNs or IP whitelisting should be enforced to limit exposure of Jenkins interfaces. Until an official patch is released, consider removing or disabling the Dead Man's Snitch Plugin version 0.1 if feasible, or replacing it with alternative monitoring solutions that properly mask sensitive tokens. Regularly audit Jenkins configurations and logs for unauthorized access or suspicious activity related to token usage. Educate DevOps and security teams about the risk of token exposure and enforce secure handling of credentials within CI/CD pipelines. Monitor Jenkins plugin repositories and vendor advisories for updates or patches addressing this vulnerability and apply them promptly once available.