Vulnerability-Lookup

GHSA-P623-MXF7-QXJM

Vulnerability from github – Published: 2026-11-10 15:57 – Updated: 2026-11-10 15:57

Summary

OctoPrint: Stored XSS via saved connection parameters

Details

Impact

OctoPrint versions 2.0.0rc1 up until version 2.0.0rc6 are susceptible to cross-site scripting via a specially crafted default port or baudrate setting on the bundled Serial Connector plugin, supplied via the API as new defaults during a connect request.

Patches

The vulnerability is patched in 2.0.0rc7.

Workaround

Check config.yaml for Javascript fragments in printerConnection.preferred.parameters.port or printerConnection.preferred.parameters.baudrate. If found, remove them. You can check who of your users had access to your instance since you flashed 2.0.0rc1 or above via auth.log.

Credits

This vulnerability was discovered and responsibly disclosed to OctoPrint by "mahn-don".

Timeline

2026-10-14: Report received 2026-10-14: Report acknowledged 2026-10-14: Report verified 2026-10-14: Fix ready for 2.0.0rc7 2026-10-20: CVE requested

Severity

2.4 (Low)


                  
                    CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:N

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JSON

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2.0.0rc6"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "OctoPrint"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.0.0rc1"
            },
            {
              "fixed": "2.0.0rc7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-123364"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-11-10T15:57:29Z",
    "nvd_published_at": "2026-11-09T17:17:27Z",
    "severity": "LOW"
  },
  "details": "## Impact\n\nOctoPrint versions 2.0.0rc1 up until version 2.0.0rc6 are susceptible to cross-site scripting via a specially crafted default `port` or `baudrate` setting on the bundled Serial Connector plugin, supplied via the API as new defaults during a `connect` request.\n\n## Patches\n\nThe vulnerability is patched in 2.0.0rc7.\n\n## Workaround\n\nCheck `config.yaml` for Javascript fragments in `printerConnection.preferred.parameters.port` or `printerConnection.preferred.parameters.baudrate`. If found, remove them. You can check who of your users had access to your instance since you flashed 2.0.0rc1 or above via `auth.log`. \n\n## Credits\n\nThis vulnerability was discovered and responsibly disclosed to OctoPrint by \"mahn-don\".\n\n## Timeline\n\n2026-10-14: Report received\n2026-10-14: Report acknowledged\n2026-10-14: Report verified\n2026-10-14: Fix ready for 2.0.0rc7\n2026-10-20: CVE requested",
  "id": "GHSA-p623-mxf7-qxjm",
  "modified": "2026-11-10T15:57:29Z",
  "published": "2026-11-10T15:57:29Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/OctoPrint/OctoPrint/security/advisories/GHSA-p623-mxf7-qxjm"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123364"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OctoPrint/OctoPrint/commit/059495787a1086868a28ba9eca8d089729242646"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/OctoPrint/OctoPrint"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OctoPrint/OctoPrint/releases/tag/2.0.0rc7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "OctoPrint: Stored XSS via saved connection parameters"
}

CVE-2026-123364 (GCVE-0-2026-123364)

Vulnerability from cvelistv5 – Published: 2026-11-09 17:10 – Updated: 2026-11-09 17:10

Title

OctoPrint: Stored XSS via saved connection parameters

Summary

OctoPrint provides a web interface for controlling consumer 3D printers. From 2.0.0rc1 until 2.0.0rc7, an authenticated user can supply a crafted default port or baudrate through a connect request to the bundled Serial Connector plugin. OctoPrint persists these values in printerConnection.preferred.parameters.port or printerConnection.preferred.parameters.baudrate and renders them as HTML when another user views the saved connection parameters, allowing script execution in that user's browser and actions within the user's OctoPrint access. This issue is fixed in version 2.0.0rc7.

Severity

2.4 (Low)


                        
                          CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:N

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7812 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/OctoPrint/OctoPrint/security/a…	x_refsource_CONFIRM
https://github.com/OctoPrint/OctoPrint/commit/059…	x_refsource_MISC
https://github.com/OctoPrint/OctoPrint/releases/t…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
OctoPrint	OctoPrint	Affected: >= 2.0.0rc1, < 2.0.0rc7

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "OctoPrint",
          "vendor": "OctoPrint",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2.0.0rc1, \u003c 2.0.0rc7"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "OctoPrint provides a web interface for controlling consumer 3D printers. From 2.0.0rc1 until 2.0.0rc7, an authenticated user can supply a crafted default port or baudrate through a connect request to the bundled Serial Connector plugin. OctoPrint persists these values in printerConnection.preferred.parameters.port or printerConnection.preferred.parameters.baudrate and renders them as HTML when another user views the saved connection parameters, allowing script execution in that user\u0027s browser and actions within the user\u0027s OctoPrint access. This issue is fixed in version 2.0.0rc7."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "ADJACENT",
            "baseScore": 2.4,
            "baseSeverity": "LOW",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "LOW"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-09T17:10:35.399Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/OctoPrint/OctoPrint/security/advisories/GHSA-p623-mxf7-qxjm",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/OctoPrint/OctoPrint/security/advisories/GHSA-p623-mxf7-qxjm"
        },
        {
          "name": "https://github.com/OctoPrint/OctoPrint/commit/059495787a1086868a28ba9eca8d089729242646",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/OctoPrint/OctoPrint/commit/059495787a1086868a28ba9eca8d089729242646"
        },
        {
          "name": "https://github.com/OctoPrint/OctoPrint/releases/tag/2.0.0rc7",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/OctoPrint/OctoPrint/releases/tag/2.0.0rc7"
        }
      ],
      "source": {
        "advisory": "GHSA-p623-mxf7-qxjm",
        "discovery": "UNKNOWN"
      },
      "title": "OctoPrint: Stored XSS via saved connection parameters"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-123364",
    "datePublished": "2026-11-09T17:10:35.399Z",
    "dateReserved": "2026-11-05T20:43:10.420Z",
    "dateUpdated": "2026-11-09T17:10:35.399Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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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.

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.

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