Plane 1.3.1 - Stored XSS in intake issue description_html

{
  "id": "309177a16c3c84f55f42136121f9e2c96bef7864123f38bbb27a7486e3ddd8cb",
  "url": "https://osv.dev/vulnerability/CVE-2026-10850",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Plane 1.3.1 - Stored XSS in intake issue description_html",
    "summary": "Plane CE 1.3.1 allows a low-privileged project member to submit arbitrary HTML/JS in the description_html field when creating an intake work item through the API v1 intake endpoint.",
    "evidence": "osv:CVE-2026-10850",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-10850",
      "aliases": [
        "CVE-2026-10850"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:L/SI:L/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/makeplane/plane",
              "type": "GIT",
              "events": [
                {
                  "introduced": "d0a4adc55bb1fa5b8c221c0c680b992d2677e9c5"
                },
                {
                  "last_affected": "d0a4adc55bb1fa5b8c221c0c680b992d2677e9c5"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "1.3.1"
                      },
                      {
                        "last_affected": "1.3.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "cpe": "cpe:2.3:a:plane:plane:1.3.1:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.3.1"
                      },
                      {
                        "last_affected": "1.3.1"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.3.1",
            "v1.3.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-10850.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:31.277477957Z",
      "provider": "osv",
      "references": [
        "https://fluidattacks.com/es/advisories/earth",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10850.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-10850",
        "https://github.com/makeplane/plane"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "Fluid Attacks",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10850.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-10850",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 498088,
  "published_at": "2026-06-17T14:39:51.37+00:00"
}