Vulnerability-Lookup

CVE-2025-32792 (GCVE-0-2025-32792)

Vulnerability from cvelistv5 – Published: 2025-04-18 16:04 – Updated: 2025-04-21 13:28

Title

ses's global contour bindings leak into Compartment lexical scope

Summary

SES safely executes third-party JavaScript 'strict' mode programs in compartments that have no excess authority in their global scope. Prior to version 1.12.0, web pages and web extensions using `ses` and the Compartment API to evaluate third-party code in an isolated execution environment that have also elsewhere used `const`, `let`, and `class` bindings in the top-level scope of a `<script>` tag will have inadvertently revealed these bindings in the lexical scope of third-party code. This issue has been patched in version 1.12.0. Workarounds for this issue involve either avoiding top-level `let`, `const`, or `class` bindings in `<script>` tags, or change these to `var` bindings to be reflected on `globalThis`.

Severity

8.7 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-04-21 13:27 UTC

CWE

CWE-497 - Exposure of Sensitive System Information to an Unauthorized Control Sphere

Assigner

GitHub_M mitre root

References

1 reference

URL	Tags
https://github.com/endojs/endo/security/advisorie…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version	CPE status
endojs	endo	Affected: < 1.12.0	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2025-32792

Vulnerability from fkie_nvd - Published: 2025-04-18 16:15 - Updated: 2026-06-17 09:12

Severity

8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/endojs/endo/security/advisories/GHSA-h9w6-f932-gq62

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "endo",
          "vendor": "endojs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.12.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "SES safely executes third-party JavaScript \u0027strict\u0027 mode programs in compartments that have no excess authority in their global scope. Prior to version 1.12.0, web pages and web extensions using `ses` and the Compartment API to evaluate third-party code in an isolated execution environment that have also elsewhere used `const`, `let`, and `class` bindings in the top-level scope of a `\u003cscript\u003e` tag will have inadvertently revealed these bindings in the lexical scope of third-party code. This issue has been patched in version 1.12.0. Workarounds for this issue involve either avoiding top-level `let`, `const`, or `class` bindings in `\u003cscript\u003e` tags, or change these to `var` bindings to be reflected on `globalThis`."
    },
    {
      "lang": "es",
      "value": "SES ejecuta de forma segura programas JavaScript de terceros en modo estricto en compartimentos sin exceso de autoridad en su \u00e1mbito global. Antes de la versi\u00f3n 1.12.0, las p\u00e1ginas web y extensiones que usaban `ses` y la API de Compartimiento para evaluar c\u00f3digo de terceros en un entorno de ejecuci\u00f3n aislado, y que tambi\u00e9n utilizaban enlaces `const`, `let` y `class` en el \u00e1mbito de nivel superior de una etiqueta `"
    }
  ],
  "id": "CVE-2025-32792",
  "lastModified": "2026-06-17T09:12:34.870",
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GHSA-H9W6-F932-GQ62

Vulnerability from github – Published: 2025-04-18 15:10 – Updated: 2025-04-18 18:34

Summary

ses's global contour bindings leak into Compartment lexical scope

Details

Impact

Web pages and web extensions using ses and the Compartment API to evaluate third-party code in an isolated execution environment that have also elsewhere used const, let, and class bindings in the top-level scope of a <script> tag will have inadvertently revealed these bindings in the lexical scope of third-party code.

Patches

This compromise is addressed in ses version 1.12.0. The mechanism for confining third-party code involves a with block and a semi-opaque scope Proxy. The proxy previously revealed any named property to the surrounding lexical scope if it were absent on globalThis, so that the third-party code would receive an informative ReferenceError, relying on the invalid assumption that only properties of globalThis are in the top-level lexical scope. The solution makes the scope proxy fully opaque. Consequently, accessing an unbound free lexical name will produce undefined instead of throwing ReferenceError. Assigning to an unbound free lexical name will continue to throw a ReferenceError.

Workarounds

This problem can be mitigated either by avoiding top-level let, const, or class bindings in <script> tags, which is an existing industry best-practice, or change these to var bindings to be reflected on globalThis, or upgrade ses to version 1.12.0 or greater.

Some bundlers by default transform top-level let, const, and class bindings to var.

Disclosure

This vulnerability was disclosed by @mingijunggrape in the course of their studies at UNIST (Ulsan National Institute of Science and Technology) as a member of the Web Security Lab (https://websec-lab.github.io/).

Severity

8.7 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "ses"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.12.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-32792"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-497"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-04-18T15:10:05Z",
    "nvd_published_at": "2025-04-18T16:15:23Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\nWeb pages and web extensions using `ses` and the `Compartment` API to evaluate third-party code in an isolated execution environment that have also elsewhere used `const`, `let`, and `class` bindings in the top-level scope of a `\u003cscript\u003e` tag will have inadvertently revealed these bindings in the lexical scope of third-party code.\n\n### Patches\n\nThis compromise is addressed in `ses` version `1.12.0`. The mechanism for confining third-party code involves a `with` block and a semi-opaque scope `Proxy`. The proxy previously revealed any named property to the surrounding lexical scope if it were absent on `globalThis`, so that the third-party code would receive an informative `ReferenceError`, relying on the invalid assumption that only properties of `globalThis` are in the top-level lexical scope. The solution makes the scope proxy fully opaque. Consequently, accessing an unbound free lexical name will produce `undefined` instead of throwing `ReferenceError`.\nAssigning to an unbound free lexical name will continue to throw a `ReferenceError`.\n\n### Workarounds\n\nThis problem can be mitigated either by avoiding top-level `let`, `const`, or `class` bindings in `\u003cscript\u003e` tags, which is an existing industry best-practice, or change these to `var` bindings to be reflected on `globalThis`, or upgrade `ses` to version `1.12.0` or greater.\n\nSome bundlers by default transform top-level `let`, `const`, and `class` bindings to `var`.\n\n### Disclosure\n\nThis vulnerability was disclosed by @mingijunggrape in the course of their studies at UNIST (Ulsan National Institute of Science and Technology) as a member of the Web Security Lab (https://websec-lab.github.io/).",
  "id": "GHSA-h9w6-f932-gq62",
  "modified": "2025-04-18T18:34:51Z",
  "published": "2025-04-18T15:10:05Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/endojs/endo/security/advisories/GHSA-h9w6-f932-gq62"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-32792"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/endojs/endo"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "ses\u0027s global contour bindings leak into Compartment lexical scope"
}

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.

Action not permitted

CVE-2025-32792 (GCVE-0-2025-32792)

FKIE_CVE-2025-32792

GHSA-H9W6-F932-GQ62

Impact

Patches

Workarounds

Disclosure

Tags

Sightings

Nomenclature

Related by attack behaviour