YesWiki before 4.7.0 Stored XSS via filtertags Action Parameters

{
  "id": "fdf941a9a3459535a3499e529c2a56e03bb76dae7b2738bf72e2f25a0709b72e",
  "url": "https://osv.dev/vulnerability/CVE-2026-116203",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "YesWiki before 4.7.0 Stored XSS via filtertags Action Parameters",
    "summary": "YesWiki before 4.7.0 contains a stored cross-site scripting vulnerability in the filtertags action, which echoes attacker-controlled token values without output encoding. Anonymous attackers can inject markup via action-attribute parameters that bypasses the allow_raw_html gate, executing JavaScript for every page viewer.",
    "evidence": "osv:CVE-2026-116203",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-116203",
      "aliases": [
        "CVE-2026-116203",
        "GHSA-f53x-3gqx-xq76"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/yeswiki/yeswiki",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "bba4abccdf68476dde3d7119019139121849fb32"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.7.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.7.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v4.6.9",
            "v4.6.8",
            "v4.6.7",
            "v4.6.6",
            "v4.6.5",
            "v4.6.4",
            "v4.6.3",
            "v4.6.2",
            "v4.6.0",
            "v4.5.5",
            "v4.5.4",
            "v4.5.3",
            "v4.5.2",
            "v4.5.1",
            "v4.4.3",
            "v4.4.2",
            "v4.4.1",
            "v4.4.0",
            "v4.3.1",
            "v4.3.0",
            "v4.2.2",
            "v4.2.1",
            "v4.2.0",
            "v4.1.5",
            "v4.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-116203.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.322451514Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/116xxx/CVE-2026-116203.json",
        "https://github.com/YesWiki/yeswiki/security/advisories/GHSA-f53x-3gqx-xq76",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-116203",
        "https://www.vulncheck.com/advisories/yeswiki-before-4.7.0-stored-xss-via-filtertags-action-parameters"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/116xxx/CVE-2026-116203.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-116203",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504845,
  "published_at": "2026-10-25T13:20:34.532+00:00"
}