EUVD-2026-70133
GHSA-mm9g-xfj4-25r6
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
PR:L for required authenticated Jenkins session; C:H for arbitrary controller file exfiltration via backup inclusion; I:L for backup destination redirect only; A:N as no availability impact.
Primary rating from Vendor (jenkins).
CVSS VectorVendor: jenkins
Lifecycle Timeline
3DescriptionCVE.org
Jenkins ThinBackup Plugin 2.1.4 and earlier allows overwriting the plugin's backup configuration through Stapler data binding, allowing attackers to redirect backup writes to an attacker-specified directory and to include arbitrary files from the Jenkins controller file system in backups.
Articles & Coverage 2
AnalysisAI
Path traversal via Stapler data binding in Jenkins ThinBackup Plugin 2.1.4 and earlier allows authenticated low-privileged attackers to overwrite the plugin's backup configuration, redirecting backup output to an attacker-specified directory and injecting arbitrary Jenkins controller filesystem files into backup archives. The primary risk is exfiltration of high-value Jenkins controller secrets - credentials.xml, SSH keys, API tokens, master.key - via the backup mechanism. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated Jenkins user account - at minimum a user with the ability to submit HTTP POST requests to the Jenkins web UI (Overall/Read plus plugin endpoint access). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.1 score with vector AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N is well-calibrated: PR:L correctly reflects the requirement for an active authenticated Jenkins session, meaningfully narrowing the attack surface compared to unauthenticated issues. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The primary fix is to upgrade the Jenkins ThinBackup Plugin to the version specified in the Jenkins security advisory at https://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-4099 - the exact remediated release version is not stated in the available input data and should be confirmed from that advisory before upgrading. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit all Jenkins deployments to identify ThinBackup Plugin 2.1.4 or earlier and map which low-level users can access the plugin. …
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Same weakness CWE-22 – Path Traversal
View allSame technique Path Traversal
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External POC / Exploit Code
Leaving vuln.today