# CVE-2026-54843: PluginUs.Net MDTF unauthenticated SQL injection

Source: https://junglewise.ai/threats/cve-2026-54843-pluginus-net-mdtf-unauthenticated-sql-injection  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-25. Updated: 2026-06-25  
License: CC BY 4.0 with a link back

CVE-2026-54843 · Severity: critical · CVSS 9.3 · Published 2026-06-25

The MDTF (WordPress Meta Data and Taxonomy Filter) plugin, used for advanced searching and filtering on WordPress websites, contains a critical security flaw. An unauthenticated attacker can exploit this vulnerability to interact directly with the website's database. This could lead to the theft of sensitive customer data, exposure of administrative credentials, or disruption of site operations.

Vendors: [PluginUs.Net](https://junglewise.ai/threats/vendors/pluginus-net).

## Quick answers

**Is CVE-2026-54843 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-54843 being exploited in the wild.

**How severe is CVE-2026-54843?** Critical severity, with a CVSS score of 9.3, published 25 June 2026.

**Which products and versions are affected?** PluginUs.Net Meta Data and Taxonomy Filter <= 1.3.7.

**Is there a fix for CVE-2026-54843?** A patch was published on 2026-06-25: Version 1.3.8 released to address the issue Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-54843 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-54843?** Check whether you run PluginUs.Net Meta Data and Taxonomy Filter at an affected version. 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

A SQL injection vulnerability exists in the MDTF (WordPress Meta Data and Taxonomy Filter) plugin due to improper neutralization of special elements used in SQL commands (CWE-89). The flaw allows an unauthenticated remote attacker to execute arbitrary SQL queries against the backend database via specially crafted network requests. This can result in unauthorized data retrieval, including sensitive user information and configuration details. The vulnerability is present in versions 1.3.7 and earlier; it was addressed in version 1.3.8.

## Affected products

- PluginUs.Net MDTF (WordPress Meta Data and Taxonomy Filter) <= 1.3.7

## Timeline

- 2026-05-19: other: Vulnerability reported by researcher Roll
- 2026-06-18: advisory: Patchstack published advisory
- 2026-06-25: disclosed: CVE published to NVD
- 2026-06-25: patched: Version 1.3.8 released to address the issue

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/wp-meta-data-filter-and-taxonomy-filter/vulnerability/wordpress-mdtf-plugin-1-3-7-sql-injection-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/wp-meta-data-filter-and-taxonomy-filter/vulnerability/wordpress-mdtf-plugin-1-3-7-sql-injection-vulnerability?_s_id=cve)