CVE-2026-113599CWE-639

CVE-2026-113599

Medium · published October 20, 2026

CVSS v3.1
5.4
EPSS
0%
Percentile
26.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
CVSS v4.0
5.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
EPSS
0.00340 · 26.2th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-10-20T20:17Z
References (5)
https://github.com/modoboa/modoboa/blob/2.7.2/modoboa/autoreply/api/v2/serializers.py · [email protected]https://github.com/modoboa/modoboa/commit/e0a4e3b9ee8ad84dba46e4c0f04cbbe7cf78c38d · [email protected]https://github.com/modoboa/modoboa/issues/3945 · [email protected]https://github.com/modoboa/modoboa/releases/tag/2.8.0 · [email protected]https://www.vulncheck.com/advisories/modoboa-before-2.8.0-idor-via-api-v2-armessages-auto-reply-creation · [email protected]
EPSS history
Timeline
  • 22 OCT 03:29Z
    EPSS moved — → 0%
    epss
  • 20 OCT 15:40Z
    Modoboa before 2.8.0 IDOR via API v2 armessages Auto-Reply Creation
    cvelistv5
  • 20 OCT 15:40Z
    Modoboa before 2.8.0 IDOR via API v2 armessages Auto-Reply Creation
    cvelistv5