CVE-2022-0834

Amelia <= 1.0.46 - Stored Cross Site Scripting via lastName

2022-03-02 00:00
Vinay Kumar

Strategic Overview

Status
Patched in 1.0.47
Affected Plugin
Booking for Appointments and Events Calendar – Amelia
Affected Version
<= 1.0.46
CVSS
7.2High
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2022-0834
View all Booking for Appointments and Events Calendar – Amelia vulnerabilities

At a glance

CVE-2022-0834 is a high-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Booking for Appointments and Events Calendar WordPress plugin, affecting versions <= 1.0.46. It carries a CVSS score of 7.2 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 1.0.47; sites on affected versions should update now. Disclosed March 2022, reported by Vinay Kumar.

Vulnerability Overview

The Amelia WordPress plugin is vulnerable to Cross-Site Scripting due to insufficient escaping and sanitization of the lastName parameter found in the ~/src/Application/Controller/User/Customer/AddCustomerController.php file which allows attackers to inject arbitrary web scripts onto a pages that executes whenever a user accesses the booking calendar with the date the attacker has injected the malicious payload into. This affects versions up to and including 1.0.46.

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-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Reaching this weakness in Booking for Appointments and Events Calendar <= 1.0.46 takes a caller who can reach the endpoint. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Booking for Appointments and Events Calendar the fix is 1.0.47: builds <= 1.0.46 are affected, anything from 1.0.47 onward is not.

Remediation

Update to version 1.0.47, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Booking for Appointments and Events Calendar: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Booking for Appointments and Events Calendar 1.0.47 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2022-0834https://www.wordfence.com/threat-intel/vulnerabilities/id/73f12f22-c0a4-4010-9634-ce7308254028https://nvd.nist.gov/vuln/detail/CVE-2022-0834

Related records

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