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Easy Invoice CVE-2026-66676

| EUVDEUVD-2026-81512 MEDIUM
Missing Authorization (CWE-862)
2026-09-17 Patchstack GHSA-9fhm-wjxp-vcjv
5.3
CVSS 3.1 · Vendor: Patchstack
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Severity by source

Vendor (Patchstack) PRIMARY
5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
vuln.today AI
5.3 MEDIUM

Unauthenticated, remote, low-complexity missing-authorization flaw exposing limited data only, so PR:N/UI:N with C:L and I/A:N; scope unchanged.

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

Primary rating from Vendor (Patchstack).

CVSS VectorVendor: Patchstack

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

3
Metadata Corrected
Sep 17, 2026 - 14:40 vuln.today
tag: PHP added
Analysis Generated
Sep 17, 2026 - 14:39 vuln.today
CVE Published
Sep 17, 2026 - 13:24 cve.org
MEDIUM 5.3

DescriptionCVE.org

Unauthenticated Broken Access Control in Easy Invoice <= 2.3.8 versions.

AnalysisAI

Unauthenticated attackers can access sensitive information from WordPress sites running the Easy Invoice plugin versions up to and including 2.3.8 due to a missing authorization check (CWE-862). The vulnerability requires only network access to the target site and results in partial confidentiality impact (CVSS 5.3), with no data modification or denial of service. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Exploit
technique details hidden
Execution
technique details hidden
Impact
technique details hidden

Vulnerability AssessmentAI

Exploitation Requires only network reachability to a WordPress site running the Easy Invoice plugin at version ≤2.3.8; exploitation is unauthenticated (PR:N) with no user interaction (UI:N) and low complexity (AC:L) against default installations. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment This is a genuine-but-modest-priority issue. … 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 is identified in the provided data; consult the Patchstack advisory at https://patchstack.com/database/wordpress/plugin/easy-invoice/vulnerability/wordpress-easy-invoice-plugin-2-3-8-broken-access-control-vulnerability?_s_id=cve for the latest patch information. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-66676 vulnerability details – vuln.today

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