Cross-user appointment modification via reusable shared nonce
Published Jul 29, 2026 · Updated Jul 29, 2026
Authorization bypass in Easy Appointments before 3.12.28 allows remote authenticated users to modify another user's appointment data. The customer-data update action accepts an attacker-chosen appointment_id after validating only a shared edit nonce, without checking appointment ownership. Subscriber access and an attacker-owned appointment expose the nonce; reused against a victim ID, it overwrites contact metadata and can redirect later notifications.
Summary
What happened
Authorization bypass in Easy Appointments before 3.12.28 allows remote authenticated users to modify another user's appointment data. The customer-data update action accepts an attacker-chosen appointment_id after validating only a shared edit nonce, without checking appointment ownership. Subscriber access and an attacker-owned appointment expose the nonce; reused against a victim ID, it overwrites contact metadata and can redirect later notifications.
The record
- CVE
- CVE-2026-14224
- Published
- Jul 29, 2026
- Updated
- Jul 29, 2026
- Vendor
- Easy Appointments
- Product
- Easy Appointments
- Classifications
- CWE-639, T1565.001
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 29, 2026CVE publishedPublication date reported by the CVE source.
- Jul 29, 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.
- Affected versionversion=0 <=3.12.26
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- WPScan cross-user appointment modification proof of conceptproof of concept · validated
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Technologies
Your stack
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Your stack
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