CVE-2023-37387

Classified Listing <= 2.4.5 - Cross-Site Request Forgery via rtcl_ajax_thumbnail_delete

2023-07-05 00:00
István Márton

Strategic Overview

Status
Patched in 2.4.6
Affected Plugin
Classified Listing – AI-Powered Classified ads & Business Directory
Affected Version
<= 2.4.5
CVSS
4.3Medium
Weakness type
CWE-352 · Cross-Site Request Forgery (CSRF)
CVE
CVE-2023-37387
View all Classified Listing – AI-Powered Classified ads & Business Directory vulnerabilities

At a glance

CVE-2023-37387 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the Classified Listing WordPress plugin, affecting versions <= 2.4.5. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 2.4.6; sites on affected versions should update now. Disclosed July 2023, reported by István Márton.

Vulnerability Overview

The Classified Listing plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 2.4.5. This is due to missing or incorrect nonce validation on the rtcl_ajax_thumbnail_delete function. This makes it possible for unauthenticated attackers to delete the post thumbnail via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

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.

CWE-352: Cross-Site Request Forgery (CSRF)

Reaching this weakness in Classified Listing <= 2.4.5 takes a caller who can reach the endpoint. Cross-site request forgery abuses the fact that browsers attach a victim's cookies to any request, so a state-changing action that only checks who you are, not whether you meant to act, can be triggered from another site.

An attacker who gets a logged-in user to load a crafted page can perform that action as them, with the impact scaling to whatever the victim's role is allowed to do. For Classified Listing the fix is 2.4.6: builds <= 2.4.5 are affected, anything from 2.4.6 onward is not.

Remediation

Update to version 2.4.6, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Classified Listing: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Classified Listing 2.4.6 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-37387https://www.wordfence.com/threat-intel/vulnerabilities/id/2352dce7-5302-4892-9ae2-bf814f029af4https://nvd.nist.gov/vuln/detail/CVE-2023-37387

Related records

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