CVE-2023-0631

Paid Memberships Pro <= 2.9.11 - Authenticated (Subscriber+) SQL Injection via Shortcodes

2023-02-28 00:00
Marc-Alexandre Montpas

Strategic Overview

Status
Patched in 2.9.12
Affected Plugin
Paid Memberships Pro – Content Restriction, User Registration, & Paid Subscriptions
Affected Version
<= 2.9.11
CVSS
7.7High
Weakness type
CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CVE
CVE-2023-0631
View all Paid Memberships Pro – Content Restriction, User Registration, & Paid Subscriptions vulnerabilities

At a glance

CVE-2023-0631 is a high-severity Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in the Paid Memberships Pro WordPress plugin, affecting versions <= 2.9.11. It carries a CVSS score of 7.7 (reachable over the network; low attack complexity; high confidentiality impact). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 2.9.12; sites on affected versions should update now. Disclosed February 2023, reported by Marc-Alexandre Montpas.

Vulnerability Overview

The Paid Memberships Pro plugin for WordPress is vulnerable to generic SQL Injection via the 'membership' shortcode in versions up to, and including, 2.9.11 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers with subscriber-level access, and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

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 interaction from a victim user. A successful exploit has high impact on confidentiality.

CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Paid Memberships Pro <= 2.9.11 carries this weakness at membership, and reaching it takes an account at Subscriber level or above. SQL injection happens when request data is concatenated into a query instead of being bound as a parameter, letting an attacker change the structure of the statement rather than just its values.

A working injection can read any table the database user can see, which on a WordPress install means user records, password hashes and session or API secrets stored in options. For Paid Memberships Pro the fix is 2.9.12: builds <= 2.9.11 are affected, anything from 2.9.12 onward is not.

Remediation

Update to version 2.9.12, or a newer patched version

How does WordSec protect against this?

An attacker needs Subscriber access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Paid Memberships Pro 2.9.12 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-0631https://www.wordfence.com/threat-intel/vulnerabilities/id/103a7e7b-74bb-4691-8670-c66ed2144596https://nvd.nist.gov/vuln/detail/CVE-2023-0631

Related records

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