CVE-2022-0694

Advanced Booking Calendar <= 1.6.9 - Unauthenticated SQL Injection

2022-02-28 00:00

Strategic Overview

Status: Patched in 1.7.0
Affected Plugin: Advanced Booking Calendar
Affected Version: <= 1.6.9
CVSS: 9.8Critical
Weakness type: CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CVE: CVE-2022-0694

View all Advanced Booking Calendar vulnerabilities

At a glance

CVE-2022-0694 is a critical-severity Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in the Advanced Booking Calendar WordPress plugin, affecting versions <= 1.6.9. It carries a CVSS score of 9.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 1.7.0; sites on affected versions should update now. Disclosed February 2022, reported by cydave.

Vulnerability Overview

The Advanced Booking Calendar WordPress plugin before 1.7.0 does not validate and escape the calendar parameter before using it in a SQL statement via the abc_booking_getSingleCalendar AJAX action (available to both unauthenticated and authenticated users), leading to an unauthenticated SQL injection

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. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Reaching this weakness in Advanced Booking Calendar <= 1.6.9 takes no account at all. SQL injection happens when request data is concatenated into a query instead of being bound as a parameter, letting an attacker change the structure of the statement rather than just its values.

A working injection can read any table the database user can see, which on a WordPress install means user records, password hashes and session or API secrets stored in options. For Advanced Booking Calendar the fix is 1.7.0: builds <= 1.6.9 are affected, anything from 1.7.0 onward is not.

Remediation

Update to version 1.7.0, or a newer patched version

How does WordSec protect against this?

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Advanced Booking Calendar 1.7.0 closes this, and updating the plugin is the step that ends it.

Firewall
Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2022-0694 https://www.wordfence.com/threat-intel/vulnerabilities/id/48949329-8918-4d37-9f3a-1005e99d7e4d https://nvd.nist.gov/vuln/detail/CVE-2022-0694

Related records

Same weakness class

Other vulnerabilities in Advanced Booking Calendar

CVSS Vector

9.8

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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