Vulnerability-Lookup

GHSA-MMXC-95CH-2J7C

Vulnerability from github – Published: 2026-04-01 21:24 – Updated: 2026-04-06 16:46

Summary

@payloadcms/next has Stored XSS in Admin Panel

Details

Impact

A stored Cross-site Scripting (XSS) vulnerability existed in the admin panel. An authenticated user with write access to a collection could save content that, when viewed by another user, would execute in their browser.

Consumers are affected if ALL of these are true:

Payload version < v3.78.0
At least one collection with versions enabled
An authenticated user has create or update access to that collection

Patches

This vulnerability has been patched in v3.78.0. Output encoding has been added to prevent user-supplied content from being interpreted as markup.

Users should upgrade to v3.78.0 or later.

Workarounds

If consumers cannot upgrade immediately:

Restrict create and update access to versioned collections to trusted roles only.

Severity

8.7 (High)


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

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JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@payloadcms/next"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.78.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-34748"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-01T21:24:22Z",
    "nvd_published_at": "2026-04-01T20:16:27Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\nA stored Cross-site Scripting (XSS) vulnerability existed in the admin panel. An authenticated user with write access to a collection could save content that, when viewed by another user, would execute in their browser.\n\nConsumers are affected if ALL of these are true:\n\n- Payload version **\u003c v3.78.0**\n- At least one collection with versions enabled\n- An authenticated user has `create` or `update` access to that collection\n\n### Patches\n\nThis vulnerability has been patched in **v3.78.0**. Output encoding has been added to prevent user-supplied content from being interpreted as markup.\n\nUsers should upgrade to **v3.78.0** or later.\n\n### Workarounds\n\nIf consumers cannot upgrade immediately:\n\n- Restrict `create` and `update` access to versioned collections to trusted roles only.",
  "id": "GHSA-mmxc-95ch-2j7c",
  "modified": "2026-04-06T16:46:57Z",
  "published": "2026-04-01T21:24:22Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/payloadcms/payload/security/advisories/GHSA-mmxc-95ch-2j7c"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34748"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/payloadcms/payload"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "@payloadcms/next has Stored XSS in Admin Panel"
}

CVE-2026-34748 (GCVE-0-2026-34748)

Vulnerability from cvelistv5 – Published: 2026-04-01 19:48 – Updated: 2026-04-02 16:24

Title

@payloadcms/next has Stored XSS in Admin Panel

Summary

Payload is a free and open source headless content management system. Prior to version 3.78.0 in @payloadcms/next, a stored Cross-Site Scripting (XSS) vulnerability existed in the admin panel. An authenticated user with write access to a collection could save content that, when viewed by another user, would execute in their browser. This issue has been patched in version 3.78.0.

Severity

8.7 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-02 15:49 UTC

CWE

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

Assigner

GitHub_M mitre root

References

1 reference

URL	Tags
https://github.com/payloadcms/payload/security/ad…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
payloadcms	payload	Affected: < 3.78.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-34748",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-02T15:49:07.409157Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-02T16:24:38.880Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "payload",
          "vendor": "payloadcms",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.78.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Payload is a free and open source headless content management system. Prior to version 3.78.0 in @payloadcms/next, a stored Cross-Site Scripting (XSS) vulnerability existed in the admin panel. An authenticated user with write access to a collection could save content that, when viewed by another user, would execute in their browser. This issue has been patched in version 3.78.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "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": "2026-04-01T19:48:10.297Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/payloadcms/payload/security/advisories/GHSA-mmxc-95ch-2j7c",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/payloadcms/payload/security/advisories/GHSA-mmxc-95ch-2j7c"
        }
      ],
      "source": {
        "advisory": "GHSA-mmxc-95ch-2j7c",
        "discovery": "UNKNOWN"
      },
      "title": "@payloadcms/next has Stored XSS in Admin Panel"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-34748",
    "datePublished": "2026-04-01T19:48:10.297Z",
    "dateReserved": "2026-03-30T19:17:10.224Z",
    "dateUpdated": "2026-04-02T16:24:38.880Z",
    "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.

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.