GHSA-76VF-MPMX-777J

Vulnerability from github – Published: 2025-05-07 15:27 – Updated: 2025-05-07 19:08
VLAI?
Summary
Graylog Allows Session Takeover via Insufficient HTML Sanitization
Details

Impact

It is possible to obtain user session cookies by submitting an HTML form as part of an Event Definition Remediation Step field. For this attack to succeed, the attacker needs a user account with permissions to create event definitions, while the user must have permissions to view alerts. Additionally, an active Input must be present on the Graylog server that is capable of receiving form data (e.g. a HTTP input, TCP raw or syslog etc).

Patches

Workarounds

None, as long as the relatively rare prerequisites are met.

Analysis provided by Fabian Yamaguchi - Whirly Labs (Pty) Ltd

Severity ?
8.0 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 6.0.13"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "org.graylog2:graylog2-server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.0.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 6.1.9"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "org.graylog2:graylog2-server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.1.0"
            },
            {
              "fixed": "6.1.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-46827"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-05-07T15:27:24Z",
    "nvd_published_at": "2025-05-07T16:15:22Z",
    "severity": "HIGH"
  },
  "details": "### Impact\nIt is possible to obtain user session cookies by submitting an HTML form as part of an Event Definition Remediation Step field. \nFor this attack to succeed, the attacker needs a user account with permissions to create event definitions, while the user must have permissions to view alerts. Additionally, an active Input must be present on the Graylog server that is capable of receiving form data (e.g. a HTTP input, TCP raw or syslog etc).\n\n### Patches\n\n### Workarounds\nNone, as long as the relatively rare prerequisites are met.\n\nAnalysis provided by Fabian Yamaguchi - Whirly Labs (Pty) Ltd",
  "id": "GHSA-76vf-mpmx-777j",
  "modified": "2025-05-07T19:08:39Z",
  "published": "2025-05-07T15:27:24Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/Graylog2/graylog2-server/security/advisories/GHSA-76vf-mpmx-777j"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-46827"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/Graylog2/graylog2-server"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Graylog Allows Session Takeover via Insufficient HTML Sanitization"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.