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CVE Record

CVE-2026-9579: JeecgBoot SysUser userEdit user.getUsername access control

A vulnerability was found in JeecgBoot up to 3.9.1. Impacted is the function user.getUsername of the file /sys/user/login/setting/userEdit of the component SysUser. The manipulation of the argument userIdentity results in improper access controls. The attack may be launched remotely. The exploit has been made public and could be used. Upgrading to version 3.9.2 is recommended to address this issue. The affected component should be upgraded.

MediumCVSS 6.5Not KEV-listed Updated
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Glexia's Take moderate

Analyst readout for executives and security teams

Plain-English summary

JeecgBoot has an access-control flaw in a SysUser user-edit setting function. A remote user with required permissions may manipulate userIdentity and gain improper access. Public exploit information exists, but the bundle does not show CISA KEV listing or confirmed active exploitation.

Executive priority

Treat as a near-term remediation item, especially for internet-accessible JeecgBoot admin portals. The risk is moderate because exploitation details are public, but evidence provided does not show active exploitation or unauthenticated compromise.

Technical view

CVE-2026-9579 affects JeecgBoot SysUser /sys/user/login/setting/userEdit, specifically user.getUsername handling of userIdentity. The CVSS v2 vector is 6.5 with network access and single authentication required. Sources recommend upgrading to 3.9.2, though the affected-version list is internally inconsistent.

Likely exposure

Exposure is most likely in JeecgBoot deployments running versions up to 3.9.1 with reachable SysUser user-management functionality. The bundle also lists 3.9.2 under affected versions while recommending it as fixed, so teams should verify against vendor release notes.

Exploitation context

The source bundle states the attack can be launched remotely and that exploit material is public. It does not cite KEV inclusion or confirmed in-the-wild exploitation. CVSS and CTI tags indicate permissions are required, so unauthenticated exposure is not established by the provided evidence.

Researcher notes

Key uncertainty is version scope: the narrative says up to 3.9.1 and recommends 3.9.2, while the affected list also includes 3.9.2. Validate against upstream issue and release artifacts before closing exposure.

Mitigation direction

  • Upgrade the affected JeecgBoot component to vendor-recommended version 3.9.2.
  • Verify whether later vendor guidance supersedes the 3.9.2 recommendation.
  • Restrict access to SysUser user-management functions to trusted administrative users.
  • Review application authorization rules around userIdentity and profile-edit operations.
  • Monitor the GitHub issue and release page for clarifications or follow-up fixes.

Validation and detection

  • Inventory all JeecgBoot instances and record deployed versions.
  • Check whether SysUser user-edit routes are reachable from untrusted networks.
  • Confirm upgraded instances are on the vendor-recommended fixed release.
  • Test that users cannot modify or access other users through userIdentity changes.
  • Review logs for unusual requests involving the affected user-edit route.
Prepared
Confidence
medium
Sources
8

Public sources used

Based on public source material and reviewed before publication.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-266: Exact CWE lookup

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cwe · medium confidence lookup

CWE-284: Authorization and privilege behavior lookup

Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2026-9579 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profile CVE Program record
Severity
Medium
CVSS
6.5 (2.0)
Known Exploited
No
Published

Vector: AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

4 CVSS vectors
6 Timeline events
1 ADP providers
7 Source links

SSVC decision data

CISA-ADP CISA Coordinator
Timestamp
Version
2.0.3
Exploitation: pocAutomatable: noTechnical Impact: partial

CVSS vector scores

4 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

Score Version Severity Vector Exploit Impact Source
6.5 CVSS 2.0 Medium AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C 8 6.4 VulDB
6.3 CVSS 3.1 Medium CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C 2.8 3.4 VulDB
6.3 CVSS 3.0 Medium CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C 2.8 3.4 VulDB
5.3 CVSS 4.0 Medium CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P — — VulDB

Vulnerability scoring details

Base CVSS 4.0 score

5.3 Medium
CVSS 4.0 vector shape for CVE-2026-9579 Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. Source timeline VulDB

    Advisory disclosed

  2. Source timeline VulDB

    VulDB entry created

  3. CVE reserved CVE Program

    The CVE ID was reserved by the assigning CNA.

  4. Source timeline VulDB

    VulDB entry last update

  5. CVE published CVE Program

    The CVE record was published.

  6. CVE updated CVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADP CISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

Vendor Product Version / package Status
n/a JeecgBoot 3.9.0, 3.9.1, 3.9.2 Listed
Weakness

CWE details

CWE-266CWE-284

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-266 · source CWE mapping

CWE mapping pending import

This CVE carries a CWE mapping that will resolve to a full Glexia CWE intelligence page after the official CWE import is complete.

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CWE-284 · source CWE mapping

CWE mapping pending import

This CVE carries a CWE mapping that will resolve to a full Glexia CWE intelligence page after the official CWE import is complete.

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