CVE-2026-55572 e107: SQL injection in alt_auth plugin (otherdb / e107db backends) via login username
Unauthenticated attackers can inject SQL via login username in e107 alt_auth plugin if external database backends are configured, exposing or modifying data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-55572?
CVE-2026-55572 is a critical SQL injection vulnerability in e107inc e107, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-89
Which versions are affected by CVE-2026-55572?
How do I fix CVE-2026-55572?
No fix has been published for CVE-2026-55572 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-55572 being exploited?
There is no known exploitation of CVE-2026-55572 in the wild and no public exploit code.
Sources
Also known as GHSA-5f75-c25x-59wx.