Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab

{
  "id": "eb8498d9d0f1f82611d6e50e7b74e230c9bde1ee6586b4cc5818dc203eeff8ce",
  "url": "https://osv.dev/vulnerability/CVE-2025-2255",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab",
    "summary": "An issue has been discovered in Gitlab EE/CE for AppSec affecting all versions from 13.5.0 before 17.8.6, 17.9 before 17.9.3, and 17.10 before 17.10.1. Certain error messages could allow Cross-Site Scripting attacks (XSS). for AppSec.",
    "evidence": "osv:CVE-2025-2255",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-2255",
      "aliases": [
        "BIT-gitlab-2025-2255",
        "CVE-2025-2255"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://gitlab.com/gitlab-org/gitlab",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2f8ec2ebf58d8d4885127b9715b143e6756f2df1"
                },
                {
                  "fixed": "27e19f1747ade9da7af660001a20e2dd47219a69"
                },
                {
                  "introduced": "f5041566b342c2f30a8d63b8117272c454e18410"
                },
                {
                  "fixed": "3f8a07baae6b8ce6bcc5b35075d00164df3b3b60"
                },
                {
                  "introduced": "ef8041bebeac4b902db1666c582a3de1d495ae39"
                },
                {
                  "last_affected": "ef8041bebeac4b902db1666c582a3de1d495ae39"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "13.5.0"
                      },
                      {
                        "fixed": "17.8.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "13.5.0"
                      },
                      {
                        "fixed": "17.8.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "17.9.0"
                      },
                      {
                        "fixed": "17.9.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "17.9.0"
                      },
                      {
                        "fixed": "17.9.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:17.10.0:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "17.10.0"
                      },
                      {
                        "last_affected": "17.10.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:17.10.0:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "17.10.0"
                      },
                      {
                        "last_affected": "17.10.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "17.10.0",
            "v17.10.0-ee",
            "v17.9.0-ee"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-2255.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:31.494412667Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/2xxx/CVE-2025-2255.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-2255",
        "https://gitlab.com/gitlab-org/gitlab/-/issues/524635",
        "https://hackerone.com/reports/2994150"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "GitLab",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/2xxx/CVE-2025-2255.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-2255",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 498450,
  "published_at": "2025-03-27T12:30:47.592+00:00"
}