What is CVE-2026-3173?

CVE-2026-3173 is a medium-severity vulnerability in Mr2p Meta Field Block – Display Custom Fields In The Editor Without Coding, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-05-28.

How severe is CVE-2026-3173?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Mr2p Meta Field Block – Display Custom Fields In The Editor Without Coding

CVE-2026-3173

The Meta Field Block plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.5.1. This is due to the plugin allowing users to specify arbitrary object IDs and object types via block at…

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.000 (9.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Mr2p Meta Field Block – Display Custom Fields In The Editor Without Coding — versions 0

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

Frequently asked questions

What is CVE-2026-3173?: CVE-2026-3173 is a medium-severity vulnerability in Mr2p Meta Field Block – Display Custom Fields In The Editor Without Coding, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-05-28.
How severe is CVE-2026-3173?: Medium severity. CVSS v3 base score is 6.5 out of 10.