EUVD-2026-37640Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
Reachable over the web by any authenticated subscriber (AV:N/AC:L/PR:L/UI:N); broken auth on a shipping action yields partial data exposure and high availability impact on fulfillment.
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
Lifecycle Timeline
1DescriptionCVE.org
Subscriber Broken Authentication in Melhor Envio <= 2.16.3 versions.
AnalysisAI
Authentication bypass in the Melhor Envio WordPress plugin (versions 2.16.3 and earlier) allows low-privileged subscriber accounts to perform actions they should not be authorized for. With CVSS 7.6 (high) and a CWE-288 classification, the flaw lets any registered WordPress user escalate access against the plugin's restricted endpoints, with no public exploit identified at time of analysis. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the target WordPress site to have the Melhor Envio plugin (melhor-envio-cotacao) installed and active at version 2.16.3 or earlier, and the attacker must hold a valid WordPress account at Subscriber privilege or above (PR:L) - easily obtained on sites with open registration, which is common for WooCommerce storefronts. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H signals network-reachable, low-complexity exploitation by any authenticated user, with a high availability impact and partial confidentiality/integrity loss - a realistic risk on WordPress sites that allow subscriber-level registration (common for WooCommerce stores). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker registers a free subscriber account on a WooCommerce site running Melhor Envio (or compromises an existing low-privileged user), then sends an authenticated HTTP request to a vulnerable plugin endpoint that fails to verify the user's role. The endpoint executes a privileged shipping/quotation action - for example exposing customer order/address data or generating/cancelling shipping labels - yielding information disclosure and disrupting fulfillment. |
| Remediation | Upgrade the Melhor Envio plugin to a version newer than 2.16.3 once the vendor publishes a fixed release (patch availability per Patchstack advisory; released patched version not independently confirmed from the supplied data - verify against the Patchstack URL above before deployment). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
24 hours: Identify all WordPress instances running Melhor Envio plugin ≤2.16.3 and document current version deployments. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Same technique Information Disclosure
View allShare
External POC / Exploit Code
Leaving vuln.today