CVE-2022-0687

Appointment and Event Booking Calendar - Amelia < 1.0.47 - Arbitrary File Upload

2022-02-23 00:00
qerogram

Strategic Overview

Status
Patched in 1.0.47
Affected Plugin
Booking for Appointments and Events Calendar – Amelia
Affected Version
< 1.0.47
CVSS
8.8High
Weakness type
CWE-434 · Unrestricted Upload of File with Dangerous Type
CVE
CVE-2022-0687
View all Booking for Appointments and Events Calendar – Amelia vulnerabilities

At a glance

CVE-2022-0687 is a high-severity Unrestricted Upload of File with Dangerous Type vulnerability in the Booking for Appointments and Events Calendar WordPress plugin, affecting versions < 1.0.47. It carries a CVSS score of 8.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). The issue is fixed in version 1.0.47; sites on affected versions should update now. Disclosed February 2022, reported by qerogram.

Vulnerability Overview

The Amelia WordPress plugin before 1.0.47 stores image blobs into actual files whose extension is controlled by the user, which may lead to PHP backdoors being uploaded onto the site. This vulnerability can be exploited by logged-in users with the custom "Amelia Manager" role.

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 interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

CWE-434: Unrestricted Upload of File with Dangerous Type

Reaching this weakness in Booking for Appointments and Events Calendar < 1.0.47 takes a caller who can reach the endpoint. An unrestricted file upload lets a caller store a file whose type or destination the application does not properly constrain.

If an uploaded file lands anywhere the server will execute, the flaw becomes remote code execution and the site should be treated as fully compromised. For Booking for Appointments and Events Calendar the fix is 1.0.47: builds < 1.0.47 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. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created 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
  • Scanner
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2022-0687https://www.wordfence.com/threat-intel/vulnerabilities/id/bdd70819-57dd-4a60-9398-68d6b87da3cahttps://nvd.nist.gov/vuln/detail/CVE-2022-0687

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C