Security advisory

{
  "id": "91da482ffc1f7224385b1b05a53d213d7a55acde0913177a4b64a4faff9afa1f",
  "url": "https://osv.dev/vulnerability/CVE-2021-3313",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-3313",
    "summary": "Plone CMS until version 5.2.4 has a stored Cross-Site Scripting (XSS) vulnerability in the user fullname property and the file upload functionality. The user's input data is not properly encoded when being echoed back to the user. This data can be interpreted as executable code by the browser and allows an attacker to execute JavaScript in the context of the victim's browser if the victim opens a vulnerable page containing an XSS payload.",
    "evidence": "osv:CVE-2021-3313",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-3313",
      "aliases": [
        "CVE-2021-3313",
        "GHSA-hprr-4vfq-fcxw",
        "PYSEC-2021-78"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/plone/plone",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "d5b50de9c17faac5051d06141bd12cd3e40af8e8"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:plone:plone:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "5.2.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "5.2.3",
            "5.2.2",
            "5.2.1",
            "5.2.0",
            "5.2rc5",
            "5.2rc4",
            "5.2rc3",
            "5.2rc2",
            "5.2rc1",
            "5.2b1",
            "5.2a2",
            "5.2a1",
            "5.1rc1",
            "5.1b4",
            "5.1b3",
            "5.1b2",
            "5.1b1",
            "5.1a2",
            "5.1a1",
            "5.0.2",
            "5.0.1",
            "5.0",
            "5.0rc3",
            "5.0rc2",
            "5.0rc1",
            "5.0b4",
            "5.0b3",
            "5.0b1",
            "5.0a3",
            "5.0a2",
            "4.3.1",
            "4.3",
            "4.3b2",
            "4.3b1",
            "4.3a2",
            "4.3a1",
            "4.2b2",
            "4.2b1",
            "4.1.0",
            "4.2a2",
            "4.2a1",
            "4.1rc3",
            "4.1rc2",
            "4.1rc1",
            "4.1b2",
            "4.1b1",
            "4.1a3",
            "4.1a2",
            "4.1a1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3313.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:30.184978883Z",
      "provider": "osv",
      "references": [
        "https://plone.org/download/releases/5.2.3",
        "https://plone.org/security/hotfix/20210518",
        "https://www.compass-security.com/fileadmin/Research/Advisories/2021-07_CSNC-2021-013_XSS_in_Plone_CMS.txt"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:plone:plone:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "plone:plone",
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "5.2.4"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-3313",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 432518,
  "published_at": "2021-05-20T16:15:08.283+00:00"
}