Vulnerability-Lookup

GHSA-RG3X-36VJ-2J2W

Vulnerability from github – Published: 2026-10-20 18:31 – Updated: 2026-10-20 18:31

Details

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.

Severity

5.4 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

5.3 (Medium)


                  
                    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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-113599"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-639"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-20T16:17:09Z",
    "severity": "MODERATE"
  },
  "details": "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\u0027s mbox value. Attackers can POST to /api/v2/armessages/ to inject attacker-controlled auto-reply subject and content into victims\u0027 settings or break their auto-reply management via MultipleObjectsReturned errors.",
  "id": "GHSA-rg3x-36vj-2j2w",
  "modified": "2026-10-20T18:31:44Z",
  "published": "2026-10-20T18:31:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-113599"
    },
    {
      "type": "WEB",
      "url": "https://github.com/modoboa/modoboa/issues/3945"
    },
    {
      "type": "WEB",
      "url": "https://github.com/modoboa/modoboa/commit/e0a4e3b9ee8ad84dba46e4c0f04cbbe7cf78c38d"
    },
    {
      "type": "WEB",
      "url": "https://github.com/modoboa/modoboa/blob/2.7.2/modoboa/autoreply/api/v2/serializers.py"
    },
    {
      "type": "WEB",
      "url": "https://github.com/modoboa/modoboa/releases/tag/2.8.0"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/modoboa-before-2.8.0-idor-via-api-v2-armessages-auto-reply-creation"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-113599 (GCVE-0-2026-113599)

Vulnerability from cvelistv5 – Published: 2026-10-20 15:40 – Updated: 2026-10-20 16:19

Title

Modoboa before 2.8.0 IDOR via API v2 armessages Auto-Reply Creation

Summary

Severity

5.3 (Medium)


                        
                          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

5.4 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-20 16:19 UTC

CWE

CWE-639 - Authorization Bypass Through User-Controlled Key

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6638 records in the last 180 days details

References

5 references

URL	Tags
https://github.com/modoboa/modoboa/issues/3945	issue-tracking
https://github.com/modoboa/modoboa/commit/e0a4e3b…	patch
https://github.com/modoboa/modoboa/releases/tag/2.8.0	release-notes
https://github.com/modoboa/modoboa/blob/2.7.2/mod…	technical-description
https://www.vulncheck.com/advisories/modoboa-befo…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
modoboa	modoboa	Affected: 0 , < 2.8.0 (semver) cpe:2.3:a:modoboa:modoboa::::::::

Date Public

2026-02-25 19:34

Credits

lighthousekeeper1212 leediay153 from Viettel Post

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-113599",
                "options": [
                  {
                    "Exploitation": "none"
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                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-20T16:19:12.124795Z",
                "version": "2.0.3"
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              "type": "ssvc"
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        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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          "packageURL": "pkg:pypi/modoboa",
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    "state": "PUBLISHED"
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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