CVE-2026-5693
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe Smart Appointment & Booking plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check and a nonce validation logic flaw in the saab_cancel_booking() function in all versions up to, and including, 1.0.8. The nonce check uses && (AND) instead of || (OR), which means providing any value for the security parameter causes the entire check to be skipped. This makes it possible for unauthenticated attackers to cancel arbitrary bookings by supplying a predictable booking ID.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThe Smart Appointment & Booking WordPress plugin (versions up to 1.0.8) contains an IDOR vulnerability in the saab_cancel_booking() function. The function lacks proper capability checks and has a flawed nonce validation that uses && instead of ||, causing the security check to be bypassed entirely when any value is provided for the security parameter. This allows unauthenticated attackers to cancel arbitrary bookings by supplying predictable booking IDs.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Verify plugin installationCheck if the Smart Appointment & Booking plugin is active in WordPress by accessing Plugins > Installed Plugins in the WordPress admin dashboard, or by checking the /wp-content/plugins/ directory for the saab (or similar) plugin folder.Affected if The plugin is installed and active.
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Identify installed versionIn WordPress admin, go to Plugins > Instored Plugins and locate the Smart Appointment & Booking entry to view the version number. Alternatively, check the main plugin PHP file for the Version header comment.Affected if Version is 1.0.8 or earlier.
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Confirm vulnerable endpoint existsLocate the saab_cancel_booking() function in the plugin files, typically in the main plugin PHP file. Verify it handles booking cancellation requests.Affected if The function exists in version 1.0.8 or earlier.
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Check nonce validation logicReview the saab_cancel_booking() function code to confirm it uses && in the nonce check condition instead of ||, which allows bypass when any value is passed to the security parameter.Affected if The code shows flawed && logic in nonce validation, allowing unauthenticated access in versions 1.0.8 or earlier.
If the Smart Appointment & Booking plugin is installed at version 1.0.8 or earlier and the saab_cancel_booking() function with flawed nonce logic is present, the environment is affected by this IDOR vulnerability.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpdate to version 1.0.9 or later which fixes the nonce logic flaw. As an interim measure, disable the plugin or implement a web application firewall (WAF) rule to block booking cancellation requests from unauthenticated sources.
- Consultation2.0 h
- Implementation1.0 h
- Testing3.0 h
- Review / QA2.0 h
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-5693 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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