CVE-2026-105193

Booking Calendar < 11.8 - Unauthenticated Information Exposure

2026-10-08 00:00

Strategic Overview

Status: Patched in 11.8
Affected Plugin: Booking Calendar
Affected Version: < 11.8
CVSS: 5.3Medium
Weakness type: CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
CVE: CVE-2026-105193

View all Booking Calendar vulnerabilities

At a glance

CVE-2026-105193 is a medium-severity Exposure of Sensitive Information to an Unauthorized Actor vulnerability in the Booking Calendar WordPress plugin, affecting versions < 11.8. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 11.8; sites on affected versions should update now. Disclosed October 2026, reported by Olaf Schigt.

Vulnerability Overview

The Booking Calendar plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to 11.8. This makes it possible for unauthenticated attackers to extract sensitive user or configuration data.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

Reaching this weakness in Booking Calendar < 11.8 takes no account at all. Sensitive information exposure means data the application intended to keep internal is returned to a caller who should not be able to see it.

The disclosed data — credentials, tokens, customer records or internal paths — is usually worth more as material for a follow-up attack than as an end in itself. For Booking Calendar the fix is 11.8: builds < 11.8 are affected, anything from 11.8 onward is not.

Remediation

Update to version 11.8, or a newer patched version

How does WordSec protect against this?

This one needs no account at all, which puts it outside what login hardening can reach; WordSec's login security narrows the account-level paths around it, and the firewall is what inspects the request itself. None of that substitutes for the fix: Booking Calendar 11.8 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-105193 https://www.wordfence.com/threat-intel/vulnerabilities/id/05a36d46-236d-4a9a-8cf2-45d787e35f24 https://nvd.nist.gov/vuln/detail/CVE-2026-105193

Related records

Same weakness class

Other vulnerabilities in Booking Calendar

CVSS Vector

5.3

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityLow
IntegrityNone
AvailabilityNone

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