CVE-2026-113599 Details
Description
Modoboa before 2.8.0 contains an insecure direct object reference vulnerability that allows authenticated users to create auto-reply messages for arbitrary mailboxes by supplying another user's mbox value. Attackers can POST to /api/v2/armessages/ to inject attacker-controlled auto-reply subject and content into victims' settings or break their auto-reply management via MultipleObjectsReturned errors.
A cross-user insecure direct object reference vulnerability has been identified in Modoboa versions prior to 2.8.0. This vulnerability allows authenticated users to create auto-reply messages for any mailbox by providing another user's mailbox ID. The issue arises because the auto-reply management feature does not validate ownership of the mailbox before allowing modifications. Exploitation of this vulnerability can disrupt the auto-reply settings of the targeted user or inject unauthorized content into their auto-reply messages.
Users can update to Modoboa version 2.8.0 or later, where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 20, 2026CISA-ADP
Assessed Oct 20, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/modoboa/modoboa/blob/2.7.2/modoboa/autoreply/api/v2/serializers.py | [email protected] | Source CodeVendor |
| https://github.com/modoboa/modoboa/commit/e0a4e3b9ee8ad84dba46e4c0f04cbbe7cf78c38d | [email protected] | Source CodeVendor |
| https://github.com/modoboa/modoboa/issues/3945 | [email protected] | Issue TrackingTechnical DescriptionVendor |
| https://github.com/modoboa/modoboa/releases/tag/2.8.0 | [email protected] | Release NotesVendor |
| https://www.vulncheck.com/advisories/modoboa-before-2.8.0-idor-via-api-v2-armessages-auto-reply-creation | [email protected] | AdvisoryBundleRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-639 | Authorization Bypass Through User-Controlled Key | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Modoboa | >= 0, < 2.8.0 |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 20, 2026 | CVE Modified | CISA-ADP |
| Oct 20, 2026 | New CVE Received | [email protected] |