Vulnerability-Lookup

GHSA-8WCH-G3F4-9XPR

Vulnerability from github – Published: 2026-09-14 03:30 – Updated: 2026-09-17 18:31

Details

N-able Mail Assure through April 2026 contains a design-level authorization flaw that allows an authenticated SMTP user to send outbound email using MAIL FROM addresses belonging to other tenants. When connecting to the SMTP TCP port and performing SMTP AUTH with valid credentials, the server accepts arbitrary sender domains without enforcing any domain-to-account binding. As a result, an attacker from any tenant can impersonate other tenant domains, producing messages that pass SPF and DMARC validation. NOTE: N-able's position is that the behavior is intended functionality of its shared SMTP relay architecture and that the service does not represent that it enforces per-tenant sender-domain binding.

Severity

4.3 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2025-68624"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-290"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-14T01:16:27Z",
    "severity": "MODERATE"
  },
  "details": "N-able Mail Assure through April 2026 contains a design-level authorization flaw that allows an authenticated SMTP user to send outbound email using MAIL FROM addresses belonging to other tenants. When connecting to the SMTP TCP port and performing SMTP AUTH with valid credentials, the server accepts arbitrary sender domains without enforcing any domain-to-account binding. As a result, an attacker from any tenant can impersonate other tenant domains, producing messages that pass SPF and DMARC validation. NOTE: N-able\u0027s position is that the behavior is intended functionality of its shared SMTP relay architecture and that the service does not represent that it enforces per-tenant sender-domain binding.",
  "id": "GHSA-8wch-g3f4-9xpr",
  "modified": "2026-09-17T18:31:32Z",
  "published": "2026-09-14T03:30:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68624"
    },
    {
      "type": "WEB",
      "url": "https://deepsec.net/speaker.html#PSLOT782"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/alessandrobertoldi/1ebe0f48aa0119d787ac0ff710057d92"
    },
    {
      "type": "WEB",
      "url": "https://github.com/alessandrobertoldi/research/blob/main/infinity-day-at-scale-deepsec2025.pdf"
    },
    {
      "type": "WEB",
      "url": "https://www.n-able.com/products/mail-assure"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2026/Jun/10"
    }
  ],
  "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:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-68624 (GCVE-0-2025-68624)

Vulnerability from cvelistv5 – Published: 2026-09-14 00:00 – Updated: 2026-09-17 16:14 Disputed Exclusively Hosted Service

Summary

Severity

4.3 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-17 16:14 UTC

CWE

CWE-290 - Authentication Bypass by Spoofing

Assigner

mitre mitre root

References

5 references

URL	Tags
https://www.n-able.com/products/mail-assure
https://deepsec.net/speaker.html#PSLOT782
https://gist.github.com/alessandrobertoldi/1ebe0f…
http://seclists.org/fulldisclosure/2026/Jun/10
https://github.com/alessandrobertoldi/research/bl…	exploit

Impacted products

1 product

Vendor	Product	Version
N-able	Mail Assure	Affected: 0 , ≤ April 2026 (custom)

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JSON

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{
  "containers": {
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        "providerMetadata": {
          "dateUpdated": "2026-09-14T00:23:07.359Z",
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            "url": "http://seclists.org/fulldisclosure/2026/Jun/10"
          }
        ],
        "title": "CVE Program Container"
      },
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        "metrics": [
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                  },
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                  }
                ],
                "role": "CISA Coordinator",
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    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
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          "vendor": "N-able",
          "versions": [
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        }
      ],
      "metrics": [
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          "cvssV3_1": {
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            "confidentialityImpact": "NONE",
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  "cveMetadata": {
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    "datePublished": "2026-09-14T00:00:00.000Z",
    "dateReserved": "2025-12-19T00:00:00.000Z",
    "dateUpdated": "2026-09-17T16:14:26.429Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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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.

Detection rules are retrieved from Rulezet.

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.

Related by attack behaviour

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.