Indico: Cross-Site-Scripting in link fields

{
  "id": "294eae7142021915bad799ee04605acebb6fd0d0313c6adf4c42238032c873d3",
  "url": "https://osv.dev/vulnerability/CVE-2026-107396",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Indico: Cross-Site-Scripting in link fields",
    "summary": "Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. Prior to 3.3.13, users who can manage events or create content, including speakers who can upload material, can store crafted javascript URLs in fields that accept custom URLs. A user who follows one of these URLs can execute attacker-controlled script in the user's browser in the Indico origin. This issue is fixed in version 3.3.13.",
    "evidence": "osv:CVE-2026-107396",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-107396",
      "aliases": [
        "CVE-2026-107396",
        "GHSA-c4wc-ggrj-jg9v",
        "PYSEC-2026-4227"
      ],
      "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/indico/indico",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "30de5ef2121d3d89bab081176073bf54448294c3"
                },
                {
                  "fixed": "d4c8c7127176efa4cb53c64119ca8ee2b551be18"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "3.3.13"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "d4c8c7127176efa4cb53c64119ca8ee2b551be18"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "30de5ef2121d3d89bab081176073bf54448294c3"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v3.3.13"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v3.3.12",
            "v3.3.11",
            "v3.3.10",
            "v3.3.9",
            "v3.3.8",
            "v3.3.7",
            "v3.3.6",
            "v3.3.5",
            "v3.3.4",
            "v3.3.3",
            "v3.3.2",
            "v3.3.1",
            "v3.3",
            "v3.2.6+docs",
            "v3.2.6",
            "v3.2.5",
            "v3.2.4",
            "v3.2.3",
            "v3.2.2",
            "v3.2.1",
            "v3.2",
            "v3.0",
            "v3.0rc2",
            "v3.0rc1",
            "v2.3.1",
            "v2.3",
            "v2.2",
            "v2.1",
            "v2.1rc6",
            "v2.1rc5",
            "v2.1rc4",
            "v2.1rc3",
            "v2.1rc2",
            "v2.1rc1",
            "v2.1b1",
            "v2.1a3",
            "v2.1a2",
            "v2.1a1",
            "v2.0rc1",
            "v2.0a1",
            "v1.9.11.dev9",
            "v1.9.11.dev8",
            "v1.9.11.dev7",
            "v1.9.11.dev6",
            "v1.9.11.dev3",
            "v1.9.9",
            "v0.97b2",
            "v0.97b"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107396.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.182855020Z",
      "provider": "osv",
      "references": [
        "https://github.com/indico/indico/releases/tag/v3.3.13",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107396.json",
        "https://github.com/indico/indico/security/advisories/GHSA-c4wc-ggrj-jg9v",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-107396",
        "https://github.com/indico/indico/commit/d4c8c7127176efa4cb53c64119ca8ee2b551be18",
        "https://github.com/indico/indico/pull/7619"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-692"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107396.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-107396",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 497123,
  "published_at": "2026-10-08T20:00:04.34+00:00"
}