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CVE Record

CVE-2026-3045: Appointment Booking Calendar <= 1.6.9.29 - Missing Authorization to Unauthenticated Sensitive Information Exposure via Settings REST API Endpoint

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.

HighCVSS 7.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This WordPress booking plugin flaw can let unauthenticated visitors read sensitive plugin settings. Exposed data may include administrator contact details, internal tokens, notification settings, and developer settings. Appointment tokens may also allow appointment modification or cancellation. Treat affected public WordPress sites as potentially exposed until the plugin is verified remediated.

Executive priority

High priority for any public site using this booking plugin. The business risk is leakage of administrative contact data and internal tokens, plus possible customer appointment disruption. Remediate promptly and rotate secrets if exposure is confirmed.

Technical view

CVE-2026-3045 is a missing authorization issue in Simply Schedule Appointments through 1.6.9.29. A public nonce exposed by the embed REST endpoint can be accepted by the settings API, which fails to filter admin-only fields. CVSS is 7.5: network-accessible, low complexity, no privileges, no user interaction, high confidentiality impact.

Likely exposure

Public WordPress sites running Appointment Booking Calendar — Simply Schedule Appointments versions up to and including 1.6.9.29 are the primary concern. Exposure is highest where booking pages are publicly reachable and plugin REST endpoints are accessible.

Exploitation context

The source bundle does not show CISA KEV listing or confirmed active exploitation. The issue is still serious because exploitation is unauthenticated, remote, and may expose secrets and appointment-management tokens without user interaction.

Researcher notes

The CVE description and Wordfence reference identify affected versions through 1.6.9.29 and CWE-862. The bundled affected metadata is inconsistent, listing version “0” with defaultStatus “unaffected.” Use vendor and WordPress plugin data to confirm exact fixed version before closure.

Mitigation direction

  • Identify all WordPress sites using Simply Schedule Appointments.
  • Update the plugin according to vendor guidance and changelog.
  • Prioritize versions above 1.6.9.29 if vendor confirms the fix there.
  • Rotate exposed internal tokens or integration secrets on affected sites.
  • Review appointment records for unauthorized modifications or cancellations.
  • Limit unnecessary public exposure of WordPress REST endpoints where operationally feasible.

Validation and detection

  • Check installed plugin version on every WordPress instance.
  • Confirm no site remains on version 1.6.9.29 or earlier.
  • Review web logs for access to the cited REST settings and embed endpoints.
  • Verify the remediated code filters unauthorized settings before returning data.
  • Audit exposed notification, developer, and integration settings for unexpected changes.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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 · medium confidence lookup

CWE-862: 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.

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cve · low confidence lookup

CVE-2026-3045 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
6Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N3.93.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

7.5High
CVSS 3.1 vector shape for CVE-2026-3045Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
croixhaugAppointment Booking Calendar — Simply Schedule Appointments Booking Plugin0unaffected
Weakness

CWE details

CWE-862

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-862 · source CWE mapping

Missing Authorization

Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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