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Easy!Appointments CVE-2026-52837

| EUVDEUVD-2026-43692 MEDIUM
Information Exposure (CWE-200)
2026-07-14 GitHub_M
PHP Information Disclosure Easyappointments
6.9
CVSS 4.0 · Vendor: GitHub_M
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Severity by source

Vendor (GitHub_M) PRIMARY
6.9 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
5.3 MEDIUM

Endpoint is unauthenticated and network-accessible with no complexity; confidentiality is Low because exposure is bounded to one customer record per hash with no integrity or availability impact.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (GitHub_M).

CVSS VectorVendor: GitHub_M

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
Patch available
Jul 14, 2026 - 18:20 EUVD
Source Code Evidence Fetched
Jul 14, 2026 - 15:40 vuln.today
Analysis Generated
Jul 14, 2026 - 15:40 vuln.today

DescriptionCVE.org

Easy!Appointments is a self hosted appointment scheduler. In versions up to and including 1.5.2, the booking reschedule view at /index.php/booking/reschedule/{appointment_hash} (handled by Booking::index()) embeds the entire customer record as inline JavaScript (const vars = {... "customer_data": {...}, ...}) without authentication and without field whitelisting. Anyone in possession of the 12-character appointment_hash - which appears in plain text in reschedule emails, confirmation page URLs, and operator-side calendar links - can read every column of that customer's row in the ea_users table. Version 1.6.0 contains a patch.

AnalysisAI

The reschedule endpoint in Easy!Appointments 1.5.2 and earlier exposes the complete customer database record to any party holding the 12-character appointment hash, with no authentication check and no field whitelisting on the ea_users row. These hashes are deliberately distributed to customers in reschedule emails, embedded in confirmation page URLs, and visible in operator calendar links, which means the effective attacker pool is anyone who has ever received or forwarded a booking email. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain appointment hash from reschedule email or confirmation URL
Exploit
Send unauthenticated HTTP GET to /index.php/booking/reschedule/{hash}
Execution
Parse inline JavaScript const vars block in HTML response
Impact
Extract full ea_users customer row including PII
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Vulnerability AssessmentAI

Exploitation The reschedule endpoint must be network-accessible (the default configuration for any Internet-facing Easy!Appointments deployment). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N) confirms the endpoint is remotely exploitable with no prerequisites, and the VC:L rating reflects that exploitation is bounded to one customer record per hash rather than bulk database access, yielding a score of 6.9. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker who receives a legitimate reschedule email for any appointment on a target instance extracts the 12-character hash from the embedded link. They then issue a plain HTTP GET request to /index.php/booking/reschedule/{hash} using a browser or curl, and the HTML response body contains an inline JavaScript object embedding the full ea_users customer record. …
Remediation Upgrade to Easy!Appointments 1.6.0, which contains the vendor-released patch per the GitHub security advisory at https://github.com/alextselegidis/easyappointments/security/advisories/GHSA-xgr6-pqjv-3pf8. … Detailed patch versions, workarounds, and compensating controls in full report.
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Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-52837 vulnerability details – vuln.today
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