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xxl-job EUVDEUVD-2026-76921

| CVE-2026-90487 LOW
Improper Privilege Management (CWE-269)
2026-09-12 VulDB GHSA-w26j-6rp4-vhj5
Privilege Escalation Java Xxl Job Xuxueli
2.1
CVSS 4.0 · Vendor: VulDB

Severity by source

Vendor (VulDB) PRIMARY
2.1 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
4.3 MEDIUM

Network-accessible endpoint requires low-privilege session; impact is read-only access to executor group config with no integrity or availability consequence.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

4
Analysis Generated
Sep 12, 2026 - 23:30 vuln.today
Severity Changed
Sep 12, 2026 - 23:22 NVD
MEDIUM LOW
CVSS changed
Sep 12, 2026 - 23:22 NVD
5.3 (MEDIUM) 2.1 (LOW)
CVE Published
Sep 12, 2026 - 23:00 cve.org
LOW 2.1

DescriptionCVE.org

A vulnerability was found in Xuxueli xxl-job up to 3.4.2. Affected by this issue is some unknown functionality of the file xxl-job-admin/src/main/java/com/xxl/job/admin/business/controller/JobGroupController.java. The manipulation results in improper privilege management. The attack may be launched remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

AnalysisAI

Improper privilege management in xxl-job admin up to version 3.4.2 exposes the loadById endpoint of JobGroupController.java to unauthorized access by low-privileged authenticated users, leaking executor group configuration data. The vulnerability resides in the admin web interface's job group management controller and allows users who should lack access to read job group details via direct endpoint calls. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Exploit
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Execution
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Vulnerability AssessmentAI

Exploitation Exploitation requires an authenticated session in the xxl-job admin web interface - the CVSS PR:L metric indicates at least low-privilege credentials are needed, though the POC title ('Missing Authentication') suggests the endpoint may not verify role or ownership. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 base score of 2.1 (AV:N/AC:L/AT:N/PR:L/UI:N/VC:L) correctly categorizes this as low-severity - the impact is limited to confidentiality of executor group configuration data with no integrity or availability consequences. … 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 No vendor-released patch has been identified at time of analysis - the vendor did not respond to the disclosure. … Detailed patch versions, workarounds, and compensating controls in full report.
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EUVD-2026-76921 vulnerability details – vuln.today
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