---
id: CVE-2026-55572
title: e107 is a content management system (CMS)
summary: >-
  e107 is a content management system (CMS). Prior to 2.3.7, the bundled
  alt_auth plugin's otherdb and e107db authentication backends interpolate the
  submitted login username directly into SQL in
  e107_plugins/alt_auth/otherdb_auth.php and …
severity: critical
cvss: 10
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-89
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T18:17:37.863'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55572'
references:
  - url: >-
      https://github.com/e107inc/e107/commit/120bd4bdbe18c8690c60a007ad6716e52e6ee965
    label: security-advisories@github.com
  - url: 'https://github.com/e107inc/e107/releases/tag/v2.3.7'
    label: security-advisories@github.com
  - url: 'https://github.com/e107inc/e107/security/advisories/GHSA-5f75-c25x-59wx'
    label: security-advisories@github.com
tags:
  - nvd
ingestedAt: '2026-10-14T18:47:39.314Z'
---

## Overview

e107 is a content management system (CMS). Prior to 2.3.7, the bundled alt_auth plugin's otherdb and e107db authentication backends interpolate the submitted login username directly into SQL in e107_plugins/alt_auth/otherdb_auth.php and e107_plugins/alt_auth/e107db_auth.php. The login() methods execute those strings with PDO::query() before effective sanitization, so an unauthenticated user can inject SQL when alt_auth is installed and either backend is configured with a live external database connection. The injection can expose or modify data available to the configured database account, and query failures can additionally disclose the generated query through the debug-message path. This issue is fixed in version 2.3.7.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.