Vvveb: Stored XSS via sanitizeHTML() bypass in user profile bio field

{
  "id": "a2824ed1d13b4d012e783ded09c2436daeb4c7ad8c8bc05df6b04737a213d420",
  "url": "https://osv.dev/vulnerability/CVE-2026-54506",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Vvveb: Stored XSS via sanitizeHTML() bypass in user profile bio field",
    "summary": "Vvveb is a powerful and easy to use CMS with page builder to build websites, blogs or ecommerce stores. Prior to 1.0.8.5, app/controller/user/profile.php accepts the user[bio] field and passes stored content through sanitizeHTML() in system/functions.php, whose on* event-handler regular expression omits the forward-slash delimiter and whose do-while condition compares the string to itself, so forbidden nested tags are removed only once. An Author-role or higher user can submit solidus-prefixed event-handler markup or nested forbidden tags that survive sanitization. The stored bio is rendered without sufficient output encoding on /author/{username}, in the admin user-management view, and potentially in comment displays, causing attacker-controlled JavaScript to execute when unauthenticated visitors, administrators, or other users view the content. This can expose browser-session data and permit victim-context account actions, defacement, or phishing. This issue is fixed in version 1.0.8.5.",
    "evidence": "osv:CVE-2026-54506",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-54506",
      "aliases": [
        "CVE-2026-54506",
        "GHSA-5cg7-phhv-4qjr"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/givanz/vvveb",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "c8fef41ad8651d348050c513451755ab8882b97e"
                },
                {
                  "fixed": "20a01ef08559ffdc97205edeecde86c8ea27e567"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.0.8.5"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "20a01ef08559ffdc97205edeecde86c8ea27e567"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "c8fef41ad8651d348050c513451755ab8882b97e"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "1.0.8.5"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.0.8.4",
            "1.0.8.3",
            "1.0.8.2",
            "1.0.8.1",
            "1.0.8",
            "1.0.7.3",
            "1.0.7.2",
            "1.0.7.1",
            "1.0.7",
            "1.0.6",
            "1.0.5",
            "1.0.4",
            "1.0.3",
            "1.0.2",
            "1.0.1",
            "1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54506.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:22.036700686Z",
      "provider": "osv",
      "references": [
        "https://github.com/givanz/Vvveb/releases/tag/1.0.8.5",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54506.json",
        "https://github.com/givanz/Vvveb/security/advisories/GHSA-5cg7-phhv-4qjr",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-54506",
        "https://github.com/givanz/Vvveb/commit/20a01ef08559ffdc97205edeecde86c8ea27e567"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-116",
          "CWE-185",
          "CWE-79"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54506.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-54506",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 488217,
  "published_at": "2026-09-17T21:47:20.53+00:00"
}