What is the CVSS score of CVE-2026-3045?

CVE-2026-3045 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2026-3045?

Within 24 hours: Audit all WordPress installations to identify use of Simply Schedule Appointments plugin and current version. Within 7 days: Implement WAF rules to block unauthorized access to `/wp-json/ssa/v1/embed-inner` endpoint and disable the plugin if non-critical until patch availability. Within 30 days: Conduct security assessment of exposed data, notify affected customers if required by privacy regulations, and prepare for immediate patching upon vendor release.

Appointment Booking Calendar Simply Schedule Appointments Booking Plugin CVE-2026-3045

EUVD-2026-11758 HIGH

Missing Authorization (CWE-862)

2026-03-13 Wordfence

WordPress Authentication Bypass Information Disclosure Appointment Booking Calendar Simply Schedule Appointments Booking Plugin Wordpress Plugin Croixhaug

7.5

CVSS 3.1 · NVD

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Access public REST endpoint
Delivery

Obtain public nonce from unauthenticated response
Exploit

Call get_item() with public nonce
Execution

Bypass authorization check
Impact

Retrieve sensitive settings data

Vulnerability Assessment

Weakness	CWE CWE-862 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V8 - Authorization Authorization checks on every request MITRE ATT&CK 1 technique across 1 tactic: Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	Simply Schedule Appointments plugin for WordPress versions up to 1.6.9.29 with the `/wp-json/ssa/v1/embed-inner` REST endpoint publicly accessible. No authentication or special configuration required for default WordPress installations.
Impact	Severity: High (7.5/10.0) No EPSS data available yet HIGH RISK: Remotely exploitable without authentication — internet-facing instances are directly vulnerable
Exploit ScenarioDerived	This vulnerability can be exploited remotely without authentication or user interaction, making it suitable for automated scanning and mass exploitation. Exploitation can lead to unauthorized access to sensitive information, potentially exposing user data, credentials, or internal system details.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.0% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAIv1 – Mar 13, 2026

High severity vulnerability in Simply Schedule Appointments (WordPress plugin). The Appointment Booking Calendar - Simply Schedule Appointments plugin for WordPress is vulnerable to unauthorized access of sensitive data in all versions up to and including 1.6.9.29. This is due to two compounding weaknesses: (1) a non-user-bound public_nonce is exposed to unauthenticated users through the public /wp-json/ssa/v1/embed-inner REST endpoint, and (2) the get_item() method ...

Earlier versions of this analysis (1)

v1 Mar 13, 2026 - 07:58 CVSS 7.5

High severity vulnerability in Simply Schedule Appointments (WordPress plugin). The Appointment Booking Calendar — Simply Schedule Appointments plugin for WordPress is vulnerable to unauthorized access of sensitive data in all versions up to and including 1.6.9.29. This is due to two compounding weaknesses: (1) a non-user-bound public_nonce is exposed to unauthenticated users through the public /wp-json/ssa/v1/embed-inner REST endpoint, and (2) the get_item() method ...

RemediationAI

Monitor Wordfence for patches and updates. Reference: https://www.wordfence.com/threat-intel/vulnerabilities/id/5970b8d6-0041-4c30-a6ce-fe67ebf415f5?source=cve

Affected VersionsENISA

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin * ≤1.6.9.29

Affected Packages

euvd appointment_booking_calendar_simply_schedule_appointments_booking_plugin no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Vulnerability Type: Missing Authorization (CWE-862) CVSS 3.1: 7.5/10.0 — Attack Vector: Network | Complexity: Low | Privileges Required: None | User Interaction: None Attack Techniques: Information Disclosure, Authentication Bypass Source: Wordfence Authentication bypass allows attackers to access protected resources without valid credentials.

Know when Appointment Booking Calendar Simply Schedule Appointments Booking Plugin gets its next vulnerability

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

NVD PRIMARY 7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

DescriptionCVE.org

The Appointment Booking Calendar - Simply Schedule Appointments plugin for WordPress is vulnerable to unauthorized access of sensitive data in all versions up to and including 1.6.9.29. This is due to two compounding weaknesses: (1) a non-user-bound public_nonce is exposed to unauthenticated users through the public /wp-json/ssa/v1/embed-inner REST endpoint, and (2) the get_item() method in SSA_Settings_Api relies on nonce_permissions_check() for authorization (which accepts the public nonce) but does not call remove_unauthorized_settings_for_current_user() to filter restricted fields. This makes it possible for unauthenticated attackers to access admin-only plugin settings including the administrator email, phone number, internal access tokens, notification configurations, and developer settings via the /wp-json/ssa/v1/settings/{section} endpoint. The exposure of appointment tokens also allows an attacker to modify or cancel appointments.

Executive ViewAI

Why It Matters

A high-severity vulnerability in the Simply Schedule Appointments WordPress plugin exposes sensitive appointment data to unauthenticated attackers. Any organization using this plugin on versions 1.6.9.29 or earlier is at immediate risk of unauthorized access to customer scheduling information and potentially other sensitive data.

Business Impact: High

Compensating Controls

Disable Simply Schedule Appointments plugin immediately if not business-critical. 2) Implement Web Application Firewall (WAF) rules to restrict access to /wp-json/ssa/v1/embed-inner REST endpoint to authenticated users only. 3) Restrict WordPress REST API access via network segmentation or IP allowlisting. 4) Monitor logs for suspicious REST API requests to the affected endpoint. 5) Conduct forensic review of access logs for evidence of exploitation. 6) Subscribe to plugin vendor security advisories for patch notification. Do not apply vendor patch until available—no remediation currently exists.

Threat Intelligence Overview

EPSS Score

0.0%

Top 91% exploitable

Data Quality

5 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.0%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +38

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.