Newsletters < 4.16 - Unauthenticated API Authentication Bypass via Type Juggling
Summary
| CVE | CVE-2026-16269 |
|---|---|
| State | PUBLISHED |
| Assigner | WPScan |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-08 07:17:09 UTC |
| Updated | 2026-08-08 07:17:09 UTC |
| Description | The Newsletters WordPress plugin before 4.16 does not strictly compare its API authentication key, allowing unauthenticated attackers to bypass the API authentication via type juggling and perform privileged actions such as modifying subscriber records and sending emails, when the optional API has been enabled. |
Risk And Classification
Primary CVSS: v3.1 4.8 MEDIUM from ADP
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
EPSS: 0.002260000 probability, percentile 0.134710000 (date 2026-08-12)
Problem Types: CWE-287 Improper Authentication | CWE-287 CWE-287 Improper Authentication
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
HighPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
LowAvailability
LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Unknown | Newsletters | affected 4.16 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| wpscan.com/vulnerability/8b09afba-16a5-4d6c-9e85-84433a3c0d66 | [email protected] | wpscan.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Haitam Lazaar (en)
CNA: WPScan (en)
There are currently no legacy QID mappings associated with this CVE.