CVE-2026-55572 e107inc CVE debrief

Who should care

Defenders responsible for e107 installations, particularly those using the alt_auth plugin with external database connections, should assess exposure and apply the patch to prevent SQL injection attacks.

Why it matters

CVE-2026-55572 is a SQL injection vulnerability in the alt_auth plugin of the e107 content management system. Defenders should prioritize verifying exposure and applying the patch to prevent SQL injection attacks.

• An unauthenticated user can inject SQL, potentially exposing or modifying data available to the configured database account.
• Query failures can disclose the generated query through the debug-message path.
• Defenders should verify exposure and apply the patch to prevent SQL injection attacks.
• The vulnerability requires verification of affected versions and remediation priority.

Technical summary

The alt_auth plugin in e107 versions prior to 2.3.7 is vulnerable to SQL injection attacks via the login username. The vulnerability exists in the otherdb and e107db authentication backends, which interpolate the submitted login username directly into SQL queries without effective sanitization. This insecure handling of user input allows an unauthenticated user to inject SQL, potentially exposing or modifying data available to the configured database account. Query failures can also disclose the generated query through the debug-message path. The vulnerability is addressed in e107 version 2.3.7, which

Defensive priority

Defenders should prioritize verifying exposure and applying the patch, as the vulnerability can expose or modify data available to the configured database account.

Recommended defensive actions

• Verify if the alt_auth plugin is installed and either the otherdb or e107db backend is configured with a live external database connection.
• Check if the e107 version is less than 2.3.7 and update to 2.3.7 or later if necessary.
• Monitor database activity for suspicious queries and implement additional security measures to prevent SQL injection attacks.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record and source item provide details on the vulnerability, including its description, affected versions, and fixed version. The vulnerability is confirmed in e107 versions prior to 2.3.7. The alt_auth plugin's otherdb and e107db backends are specifically mentioned as being vulnerable. The source item and CVE record do not provide additional information on the exploitation of this vulnerability but emphasize the importance of verifying exposure and applying the patch. Evidence is limited to public CVE Program records and may

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.