CVE-2026-75010 Roundcube CVE debrief

Who should care

Roundcube Webmail administrators and users of instances with the password plugin and modoboa driver enabled should be aware of this vulnerability. Operators of affected deployments should review and apply updates, monitor for suspicious activity, and consider compensating controls. Vulnerability management and security teams should track this issue and ensure proper mitigation measures are in place. Platform owners and security teams should review affected scope and ensure proper defensive measures are applied. Asset owners should verify affected deployments and prioritize updates or mitigations. Security teams should review monitoring and detection capabilities to identify potential exploitation attempts. Compliance and risk management teams should assess the potential impact on their organizations and ensure proper mitigation measures are in place. IT teams should review and apply updates, and ensure proper change management processes are followed. Communications teams should be aware of the potential impact on organizational communications and ensure proper mitigation measures are in place. Business stakeholders should be aware of the potential impact on business operations and ensure proper mitigation measures are in place. Security awareness and training teams should educate users on the potential risks and ensure proper defensive measures are in place. Incident response teams should be prepared to respond to potential exploitation attempts. Business continuity and disaster recovery teams should assess the potential impact on business operations and ensure proper mitigation measures are in place. Supply chain and procurement teams should review affected vendors and ensure proper mitigation measures are in place. Audit and compliance teams should review affected deployments and ensure proper mitigation measures are in place. Risk management teams should assess the potential impact on organizational risk and ensure proper mitigation measures are in place. Threat intelligence teams should monitor for potential exploitation attempts and ensure proper defensive measures are in place. Security engineering teams should review affected deployments and ensure proper

Technical summary

The modoboa driver of the password plugin in Roundcube Webmail could leak a Modoboa API authentication token to a user-controlled host via crafted session data. This issue only affects Roundcube instances using the password plugin with its modoboa driver. The vulnerability allows an attacker to potentially access sensitive information, but the exact impact is unclear. Affected deployments should prioritize updates and review compensating controls.

Defensive priority

Roundcube Webmail instances using the password plugin with its modoboa driver should be reviewed for potential exposure.

Recommended defensive actions

• Review Roundcube Webmail instances for usage of the password plugin with modoboa driver.
• Apply updates to Roundcube Webmail to version 1.6.18 or 1.7.3.
• Monitor for suspicious activity related to Modoboa API authentication tokens.
• Verify affected deployments and prioritize updates or mitigations.
• Review monitoring and detection capabilities to identify potential exploitation attempts.
• Ensure proper change management processes are followed for updates.
• Track exceptions and retest remediated assets.

Evidence notes

The modoboa driver of the password plugin in Roundcube Webmail could leak a Modoboa API authentication token to a user-controlled host via crafted session data. This issue only affects Roundcube instances using the password plugin with its modoboa driver. Evidence is limited to public CVE details and may not reflect the full scope or impact. Defenders should verify affected deployments, review Modoboa API usage, and monitor for suspicious activity related to authentication tokens.

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.