The vulnerability CVE-2025-68931 affects the samrocketman jervis library, a tool used in Jenkins Job DSL plugin scripts and shared pipeline libraries. Prior to version 2.2, jervis employs AES encryption in CBC mode with PKCS5 padding but lacks cryptographic authentication mechanisms such as HMAC or AEAD. This design flaw allows attackers to perform padding oracle attacks, a cryptanalysis technique that exploits the way padding errors are handled to decrypt ciphertext without the encryption key. Additionally, the absence of authentication enables ciphertext manipulation, potentially allowing attackers to alter encrypted data undetected. These weaknesses correspond to CWE-287 (Improper Authentication) and CWE-327 (Use of a Broken or Risky Cryptographic Algorithm). The vulnerability is remotely exploitable without any authentication or user interaction, increasing its risk profile. The CVSS 4.0 base score of 8.7 reflects high severity due to the network attack vector, low attack complexity, and high impact on confidentiality and integrity. No known exploits are currently in the wild, but the vulnerability is publicly disclosed and fixed in jervis version 2.2. Organizations using Jenkins pipelines that rely on jervis for encryption should prioritize upgrading and reviewing their encryption usage to prevent data leakage or pipeline sabotage.

For European organizations, this vulnerability threatens the confidentiality and integrity of sensitive data processed within Jenkins pipelines that utilize the jervis library for encryption. Attackers could decrypt encrypted secrets, credentials, or configuration data, leading to unauthorized access to critical systems or intellectual property. Manipulation of encrypted data could result in pipeline sabotage, causing incorrect builds, deployments, or exposure of internal processes. This risk is particularly acute for industries relying heavily on CI/CD automation, such as finance, manufacturing, and technology sectors prevalent in Europe. The lack of authentication and ease of remote exploitation means attackers can leverage this vulnerability without insider access or user interaction, increasing the attack surface. If exploited, it could lead to significant operational disruption, data breaches, and compliance violations under regulations like GDPR. The absence of known exploits currently provides a window for proactive mitigation, but the public disclosure increases the risk of future exploitation attempts.

1. Upgrade all instances of the jervis library to version 2.2 or later immediately to apply the fix that adds proper authentication to the encryption process. 2. Audit all Jenkins pipeline scripts and Job DSL plugin scripts to identify usage of jervis for encryption and verify that no sensitive data is encrypted using vulnerable versions. 3. Replace AES/CBC/PKCS5Padding encryption with authenticated encryption modes such as AES-GCM or AES-CCM if custom encryption is implemented outside of jervis. 4. Implement strict access controls and monitoring on Jenkins environments to detect unusual pipeline activity or unauthorized access attempts. 5. Review and rotate any secrets or credentials that may have been encrypted with vulnerable jervis versions to prevent misuse if data was compromised. 6. Educate DevOps and security teams about the risks of improper cryptographic practices and encourage use of vetted libraries with authenticated encryption. 7. Consider deploying runtime application self-protection (RASP) or endpoint detection tools to identify exploitation attempts targeting Jenkins pipelines. 8. Maintain an inventory of all Jenkins plugins and libraries to ensure timely updates and vulnerability management.