---
id: "CVE-2026-91833"
kind: "vulnerability"
aliases: ["CVE-2026-91833"]
title: "WX Subscribe WordPress plugin: unauthenticated SQL injection when payment key unset"
severity: "medium"
cvss: 6.8
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "self-hosted", "wordpress", "wordpress-plugin"]
not_affected_if: ["payment-key-configured", "plugin-not-installed"]
published_at: "2026-10-16T07:17:13+00:00"
first_seen_at: "2026-10-23T21:57:12+00:00"
updated_at: "2026-10-25T03:45:14+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-91833", "first_seen_at": "2026-10-23T21:57:12+00:00"}]
---

# WX Subscribe WordPress plugin: unauthenticated SQL injection when payment key unset

The WX Subscribe WordPress plugin (through 1.2.1) passes a request parameter into a SQL statement without sanitising or escaping it. On sites where the payment key has not been configured, an unauthenticated attacker can inject SQL to read or change the site database.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check whether the WX Subscribe plugin (WordPress plugin, through 1.2.1) is installed in the WordPress plugins directory or the admin Plugins screen
- Confirm whether the plugin's payment key is configured in its settings; unknown whether the sources name the exact setting

## Fix

- Update or remove the WX Subscribe plugin; the fixed version is unknown from the sources
- Configure the payment key in the plugin settings until a fixed release is installed; unknown whether this fully closes the flaw

## Timeline

- 2026-10-23T21:57:12+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-91833

## From the sources

The WX Subscribe  微信支付付费订阅 WordPress plugin through 1.2.1 does not sanitise and escape a parameter before using it in a SQL statement, allowing unauthenticated attackers to perform SQL injection attacks on installs where the payment key has not been configured.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_