CVE-2023-40211

Post Grid <= 2.2.50 - Missing Authorization to Sensitive Information Exposure via REST API

2023-08-11 00:00
Kévin Mosbahi (Mika)

Strategic Overview

Status
Patched in 2.2.51
Affected Plugin
Post Grid
Affected Version
<= 2.2.50
CVSS
7.5High
Weakness type
CWE-862 · Missing Authorization
CVE
CVE-2023-40211
View all Post Grid vulnerabilities

At a glance

CVE-2023-40211 is a high-severity Missing Authorization vulnerability in the Post Grid WordPress plugin, affecting versions <= 2.2.50. It carries a CVSS score of 7.5 (reachable over the network; low attack complexity; high confidentiality impact). Exploitation requires no authentication. The issue is fixed in version 2.2.51; sites on affected versions should update now. Disclosed August 2023, reported by Kévin Mosbahi (Mika).

Vulnerability Overview

The Post Grid plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on multiple REST API endpoints in versions up to, and including, 2.2.50. This makes it possible for unauthenticated attackers to expose sensitive inforamtion.

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, and no interaction from a victim user. A successful exploit has high impact on confidentiality.

CWE-862: Missing Authorization

Reaching this weakness in Post Grid <= 2.2.50 takes a caller who can reach the endpoint. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Post Grid the fix is 2.2.51: builds <= 2.2.50 are affected, anything from 2.2.51 onward is not.

Remediation

Update to version 2.2.51, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Post Grid 2.2.51 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-40211https://www.wordfence.com/threat-intel/vulnerabilities/id/a52fb5f4-60ba-4077-95cd-e160a6d9a419https://nvd.nist.gov/vuln/detail/CVE-2023-40211

Related records

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