# CVE-2026-42640: Classified Listing broken access control in WordPress plugin

Source: https://junglewise.ai/threats/cve-2026-42640-classified-listing-broken-access-control-in-wordpress-plugin  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-15. Updated: 2026-06-15  
License: CC BY 4.0 with a link back

CVE-2026-42640 · Severity: medium · CVSS 6.5 · Published 2026-06-15

The Classified Listing plugin for WordPress, which allows users to create and manage classified ads, contains a security flaw that allows unauthorized individuals to perform actions they should not have access to. An attacker could potentially modify or access data without needing to log in. This could lead to unauthorized changes to site listings or exposure of internal information, impacting the integrity of the classifieds platform.

## Quick answers

**Is CVE-2026-42640 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-42640 being exploited in the wild.

**How severe is CVE-2026-42640?** Medium severity, with a CVSS score of 6.5, published 15 June 2026.

**Which products and versions are affected?** Mamunur Rashid Classified Listing <= 5.3.8.

**Is there a fix for CVE-2026-42640?** A patch was published on 2026-04-29: Version 5.3.9 released to address the issue Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-42640 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-42640?** Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The Classified Listing plugin for WordPress (versions <= 5.3.8) suffers from a broken access control vulnerability due to missing authorization checks (CWE-862). This flaw allows an unauthenticated remote attacker to execute functions or access data that should be restricted to higher-privileged users. The vulnerability stems from a failure to validate user permissions or implement proper nonce checks on specific plugin endpoints. Attackers can exploit this over the network without any user interaction. The issue is resolved in version 5.3.9.

## Affected products

- Mamunur Rashid Classified Listing <= 5.3.8

## Timeline

- 2026-01-12: disclosed: Reported by Cruzer to Patchstack
- 2026-04-29: advisory: Patchstack published the vulnerability details
- 2026-06-15: advisory: NVD published the CVE record
- 2026-04-29: patched: Version 5.3.9 released to address the issue

## References

- [https://patchstack.com/database/wordpress/plugin/classified-listing/vulnerability/wordpress-classified-listing-plugin-5-3-8-broken-access-control-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/classified-listing/vulnerability/wordpress-classified-listing-plugin-5-3-8-broken-access-control-vulnerability?_s_id=cve)