Security readout for executives and security teams
Plain-English summary
WireGuard Portal before 2.1.3 lets any logged-in non-admin user promote themselves to administrator through the profile update function. This can give full control of the VPN management portal, affecting confidentiality, integrity, and availability of VPN administration.
Executive priority
Treat as urgent for any organization using wg-portal with multiple users. A normal user account can become an administrator, potentially compromising VPN configuration and access governance. Patch promptly and audit admin memberships.
Technical view
The self-update profile endpoint accepts client-controlled user model fields and fails to preserve the protected IsAdmin attribute. An authenticated low-privilege user can cause IsAdmin to be stored as true, then receive admin privileges after re-authentication. CVSS 3.1 is 8.8 high, with CWE-269 and CWE-863.
Likely exposure
Exposure is limited to h44z wg-portal installations before version 2.1.3 where non-admin users can authenticate to the portal. Internet exposure increases business risk, but the flaw still requires valid user credentials.
Exploitation context
The CVE record and GitHub advisory describe a simple authenticated privilege escalation. The source bundle does not indicate known active exploitation, and the CVE is not listed as KEV.
Researcher notes
The root issue is mass assignment or insufficient authorization on self-update data binding. The advisory states protected fields were preserved selectively, but IsAdmin was omitted. Evidence is limited to the CVE data and GitHub advisory; no public exploitation status is provided.
Mitigation direction
- Upgrade wg-portal to version 2.1.3 or later.
- If using Docker latest from master, confirm the image includes the fixed build.
- Review vendor advisory for any environment-specific guidance.
- Restrict portal access to trusted networks where practical.
- Review existing non-admin accounts for unexpected administrator status.
Validation and detection
- Inventory wg-portal deployments and record versions.
- Confirm no deployment runs a version earlier than 2.1.3.
- Check whether user self-update functionality is enabled and reachable.
- Audit user records for unexpected IsAdmin values.
- Review portal logs for unusual profile updates followed by admin sessions.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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-269: 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.
Open ATT&CK lookupCWE-863: 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.
Open ATT&CK lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupDatabase behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupContainer behavior lookup
The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-27899 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.
CVSS vector scores
1 official scoreWe 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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/h44z/wg-portal/security/advisories/GHSA-5rmx-256w-8mj9CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Privilege Management
Improper Privilege Management represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Incorrect Authorization
Incorrect Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.