CVE-2026-5693Network attack vector

Unauthenticated booking cancellation via flawed nonce check

Published May 12, 2026 · Updated May 12, 2026

Missing authorization in ZealousWeb Smart Appointment & Booking 1.0.8 and earlier allows remote attackers to cancel arbitrary bookings. The saab_cancel_booking() function lacks a capability check and joins nonce absence and invalidity with &&, so any supplied security value bypasses rejection. An unauthenticated request with a predictable booking ID is sufficient; the published record reports booking cancellation only, not data disclosure.

CVSS severity5.3
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in ZealousWeb Smart Appointment & Booking 1.0.8 and earlier allows remote attackers to cancel arbitrary bookings. The saab_cancel_booking() function lacks a capability check and joins nonce absence and invalidity with &&, so any supplied security value bypasses rejection. An unauthenticated request with a predictable booking ID is sufficient; the published record reports booking cancellation only, not data disclosure.

The record

CVE
CVE-2026-5693
Published
May 12, 2026
Updated
May 12, 2026
Vendor
ZealousWeb
Product
Smart Appointment & Booking
Classifications
CWE-862, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 12, 2026CVE publishedPublication date reported by the CVE source.
  2. May 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.0.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ZealousWeb · Smart Appointment & Bookingversion=0 <=1.0.8

Published CVSS scores

5.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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