What’s Vulnerable › Vulnerabilities

CVE-2026-55572: e107: SQL injection in alt_auth plugin (otherdb / e107db backends) via login username

• Severity: critical (CVSS 10.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-14 · updated 2026-10-29
• Weakness: CWE-89

Description

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.

Affected products

• e107inc e107: before 2.3.7

References

• https://github.com/e107inc/e107/commit/120bd4bdbe18c8690c60a007ad6716e52e6ee965
• https://github.com/e107inc/e107/releases/tag/v2.3.7
• https://github.com/e107inc/e107/security/advisories/GHSA-5f75-c25x-59wx

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