CVE-2023-1172

Bookly <= 21.5 - Unauthenticated Stored Cross-Site Scripting via Name

2023-03-17 00:00
Vinay Kumar

Strategic Overview

Status
Patched in 21.5.1
Affected Plugin
Online Scheduling and Appointment Booking System – Bookly
Affected Version
21.5
CVSS
7.2High
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2023-1172
View all Online Scheduling and Appointment Booking System – Bookly vulnerabilities

At a glance

CVE-2023-1172 is a high-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Online Scheduling and Appointment Booking System WordPress plugin, affecting versions 21.5. 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 21.5.1; sites on affected versions should update now. Disclosed March 2023, reported by Vinay Kumar.

Vulnerability Overview

The Bookly plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the full name value in versions up to, and including, 21.5 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

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 Online Scheduling and Appointment Booking System 21.5 takes no account at all. 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 Online Scheduling and Appointment Booking System the fix is 21.5.1: builds 21.5 are affected, anything from 21.5.1 onward is not.

Remediation

Update to version 21.5.1, 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: Online Scheduling and Appointment Booking System 21.5.1 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-2023-1172https://www.wordfence.com/threat-intel/vulnerabilities/id/c3efbd9d-e2b5-4915-a964-29a49c7fba86https://nvd.nist.gov/vuln/detail/CVE-2023-1172

Related records

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