Serendipity < 2.6.1 Open Redirect via exit.php

{
  "id": "ec42290d5a6b54cee571a86562da4b338067d6f47b87be5c0a4edae52ee2cadf",
  "url": "https://osv.dev/vulnerability/CVE-2026-67350",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Serendipity < 2.6.1 Open Redirect via exit.php",
    "summary": "Serendipity before 2.6.1 contains an open redirect vulnerability in exit.php that allows unauthenticated attackers to redirect users to arbitrary external sites by supplying a malicious Base64-encoded url parameter when the Track Exits plugin is configured with commentredirection set to s9y. Attackers can craft trusted-looking URLs leveraging the legitimate blog domain to conduct phishing, deliver malware, or bypass URL reputation filters.",
    "evidence": "osv:CVE-2026-67350",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-67350",
      "aliases": [
        "CVE-2026-67350",
        "GHSA-77rw-27c5-4hxm"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/s9y/serendipity",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "9aa100a744977cd3d85e462fe5f190c866d7e8a0"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.6.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.6.1"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.6.0",
            "2.6-beta1",
            "2.5.0",
            "2.5-beta1",
            "2.4.0",
            "2.4-beta1",
            "2.3.0",
            "2.3-rc1",
            "2.3-beta1",
            "2.2.1-alpha1",
            "2.1.1",
            "2.1.0",
            "2.1-rc1",
            "2.1-beta3",
            "2.1-beta2",
            "2.1-beta1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67350.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:53.159754091Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67350.json",
        "https://github.com/s9y/Serendipity/security/advisories/GHSA-77rw-27c5-4hxm",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-67350",
        "https://www.vulncheck.com/advisories/serendipity-open-redirect-via-exit-php",
        "https://github.com/s9y/Serendipity"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-601"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67350.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-67350",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 522254,
  "published_at": "2026-07-31T14:19:01.218+00:00"
}