CVE-2026-25784 (GCVE-0-2026-25784)

Vulnerability from cvelistv5 – Published: 2026-10-23 08:54 – Updated: 2026-10-23 08:54
VLAI
Title
bluespice/wiki container: Insecure default configuration of service token authentication allows privilege escalation to sysop
Summary
Initialization of a Resource with an Insecure Default vulnerability in Hallo Welt! GmbH BlueSpice (container image bluespice/wiki) allows privilege escalation. The default value of $mwsgTokenAuthenticatorServiceCIDR in the container's LocalSettings.php was intended to restrict internal service authentication to the container network, but evaluated to an empty string when the environment variable WIKI_SERVICE_TOKEN_AUTH_ALLOWED was not set. An empty value disables the IP restriction in the token authenticator component (mwstake/mediawiki-component-token-authenticator). As a result, any user with read access to the wiki (anonymous users on publicly readable wikis) could obtain an application token from the REST API and use it to get a session with sysop privileges as the internal service user. This issue affects BlueSpice: from 5.2.3 before 5.2.7, and the 5.2.7 container images published before 2026-10-19 15:37 UTC.
Severity
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-1188 - Initialization of a Resource with an Insecure Default
  • CWE-269 - Improper Privilege Management
Assigner
HW CNA
CNA scorecard – unranked: 2 records in the last 180 days, 10 needed details
References
Impacted products
Vendor Product Version CPE status
Hallo Welt! GmbH BlueSpice Affected: 5.2.3 , < 5.2.7 (semver)
guessed Create a notification for this product.
Date Public
2026-10-19 00:00
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://hub.docker.com/r/bluespice/wiki",
          "defaultStatus": "unaffected",
          "modules": [
            "Container bluespice/wiki"
          ],
          "packageName": "bluespice/wiki",
          "product": "BlueSpice",
          "programFiles": [
            "root-fs/app/conf/LocalSettings.php"
          ],
          "repo": "https://github.com/hallowelt/docker-bluespice-wiki",
          "vendor": "Hallo Welt! GmbH",
          "versions": [
            {
              "lessThan": "5.2.7",
              "status": "affected",
              "version": "5.2.3",
              "versionType": "semver"
            }
          ]
        }
      ],
      "datePublic": "2026-10-19T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Initialization of a Resource with an Insecure Default vulnerability in Hallo Welt! GmbH BlueSpice (container image \u003ccode\u003ebluespice/wiki\u003c/code\u003e) allows privilege escalation. The default value of \u003ccode\u003e$mwsgTokenAuthenticatorServiceCIDR\u003c/code\u003e in the container\u0027s \u003ccode\u003eLocalSettings.php\u003c/code\u003e was intended to restrict internal service authentication to the container network, but evaluated to an empty string when the environment variable \u003ccode\u003eWIKI_SERVICE_TOKEN_AUTH_ALLOWED\u003c/code\u003e was not set. An empty value disables the IP restriction in the token authenticator component (\u003ccode\u003emwstake/mediawiki-component-token-authenticator\u003c/code\u003e). As a result, any user with read access to the wiki (anonymous users on publicly readable wikis) could obtain an application token from the REST API and use it to get a session with sysop privileges as the internal service user.\u003cp\u003eThis issue affects BlueSpice: from 5.2.3 before 5.2.7, and the 5.2.7 container images published before 2026-10-19 15:37 UTC.\u003c/p\u003e"
            }
          ],
          "value": "Initialization of a Resource with an Insecure Default vulnerability in Hallo Welt! GmbH BlueSpice (container image bluespice/wiki) allows privilege escalation. The default value of $mwsgTokenAuthenticatorServiceCIDR in the container\u0027s LocalSettings.php was intended to restrict internal service authentication to the container network, but evaluated to an empty string when the environment variable WIKI_SERVICE_TOKEN_AUTH_ALLOWED was not set. An empty value disables the IP restriction in the token authenticator component (mwstake/mediawiki-component-token-authenticator). As a result, any user with read access to the wiki (anonymous users on publicly readable wikis) could obtain an application token from the REST API and use it to get a session with sysop privileges as the internal service user.\n\nThis issue affects BlueSpice: from 5.2.3 before 5.2.7, and the 5.2.7 container images published before 2026-10-19 15:37 UTC."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-233",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-233 Privilege Escalation"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "other": {
            "content": {
              "text": "Scored for wikis that allow anonymous read access, where no privileges are required. In the default (non-public) BlueSpice configuration, reading the wiki requires a login (PR:L; CVSS 4.0: 8.7 / CVSS 3.1: 8.8, HIGH)."
            },
            "type": "Note"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1188",
              "description": "CWE-1188 Initialization of a Resource with an Insecure Default",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-269",
              "description": "CWE-269 Improper Privilege Management",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-23T08:54:57.880Z",
        "orgId": "ff95705b-1a40-4639-8017-a58fa868baee",
        "shortName": "HW"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://en.wiki.bluespice.com/wiki/Security:Security_Advisories/BSSA-2026-07"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/hallowelt/docker-bluespice-wiki/commit/04b840be565b508f6e741c376970909b69d2a444"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Update to BlueSpice 5.2.7 or later. Container images of 5.2.7 that were pulled before 2026-10-19 15:37 UTC must be pulled again and the containers re-created."
            }
          ],
          "value": "Update to BlueSpice 5.2.7 or later. Container images of 5.2.7 that were pulled before 2026-10-19 15:37 UTC must be pulled again and the containers re-created."
        }
      ],
      "source": {
        "discovery": "INTERNAL"
      },
      "title": "bluespice/wiki container: Insecure default configuration of service token authentication allows privilege escalation to sysop",
      "workarounds": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Set the environment variable \u003ccode\u003eWIKI_SERVICE_TOKEN_AUTH_ALLOWED\u003c/code\u003e of the wiki containers to the CIDR of the internal container network, or deny access to the REST path \u003ccode\u003e/rest.php/mws/v1/app-token/generate\u003c/code\u003e on the reverse proxy."
            }
          ],
          "value": "Set the environment variable WIKI_SERVICE_TOKEN_AUTH_ALLOWED of the wiki containers to the CIDR of the internal container network, or deny access to the REST path /rest.php/mws/v1/app-token/generate on the reverse proxy."
        }
      ],
      "x_generator": {
        "engine": "Hallo Welt! CERT"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "ff95705b-1a40-4639-8017-a58fa868baee",
    "assignerShortName": "HW",
    "cveId": "CVE-2026-25784",
    "datePublished": "2026-10-23T08:54:57.880Z",
    "dateReserved": "2026-02-06T14:21:19.086Z",
    "dateUpdated": "2026-10-23T08:54:57.880Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-25784",
      "date": "2026-10-23",
      "epss": "0.00345",
      "percentile": "0.26906"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "collectionURL": "https://hub.docker.com/r/bluespice/wiki",
                "defaultStatus": "unaffected",
                "modules": [
                  "Container bluespice/wiki"
                ],
                "packageName": "bluespice/wiki",
                "product": "BlueSpice",
                "programFiles": [
                  "root-fs/app/conf/LocalSettings.php"
                ],
                "repo": "https://github.com/hallowelt/docker-bluespice-wiki",
                "vendor": "Hallo Welt! GmbH",
                "versions": [
                  {
                    "lessThan": "5.2.7",
                    "status": "affected",
                    "version": "5.2.3",
                    "versionType": "semver"
                  }
                ]
              }
            ],
            "source": "security@bluespice.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Initialization of a Resource with an Insecure Default vulnerability in Hallo Welt! GmbH BlueSpice (container image bluespice/wiki) allows privilege escalation. The default value of $mwsgTokenAuthenticatorServiceCIDR in the container\u0027s LocalSettings.php was intended to restrict internal service authentication to the container network, but evaluated to an empty string when the environment variable WIKI_SERVICE_TOKEN_AUTH_ALLOWED was not set. An empty value disables the IP restriction in the token authenticator component (mwstake/mediawiki-component-token-authenticator). As a result, any user with read access to the wiki (anonymous users on publicly readable wikis) could obtain an application token from the REST API and use it to get a session with sysop privileges as the internal service user.\n\nThis issue affects BlueSpice: from 5.2.3 before 5.2.7, and the 5.2.7 container images published before 2026-10-19 15:37 UTC."
          }
        ],
        "id": "CVE-2026-25784",
        "lastModified": "2026-10-23T19:57:42.660",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
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                "baseScore": 9.8,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 5.9,
              "source": "security@bluespice.com",
              "type": "Secondary"
            }
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          "cvssMetricV40": [
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                "Recovery": "NOT_DEFINED",
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                "exploitMaturity": "NOT_DEFINED",
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                "modifiedAttackComplexity": "NOT_DEFINED",
                "modifiedAttackRequirements": "NOT_DEFINED",
                "modifiedAttackVector": "NOT_DEFINED",
                "modifiedPrivilegesRequired": "NOT_DEFINED",
                "modifiedSubAvailabilityImpact": "NOT_DEFINED",
                "modifiedSubConfidentialityImpact": "NOT_DEFINED",
                "modifiedSubIntegrityImpact": "NOT_DEFINED",
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                "modifiedVulnIntegrityImpact": "NOT_DEFINED",
                "privilegesRequired": "NONE",
                "providerUrgency": "NOT_DEFINED",
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                "subConfidentialityImpact": "NONE",
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                "version": "4.0",
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                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "HIGH",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "source": "security@bluespice.com",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-10-23T09:17:06.943",
        "references": [
          {
            "source": "security@bluespice.com",
            "url": "https://en.wiki.bluespice.com/wiki/Security:Security_Advisories/BSSA-2026-07"
          },
          {
            "source": "security@bluespice.com",
            "url": "https://github.com/hallowelt/docker-bluespice-wiki/commit/04b840be565b508f6e741c376970909b69d2a444"
          }
        ],
        "sourceIdentifier": "security@bluespice.com",
        "vulnStatus": "Deferred",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-269"
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              {
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                "value": "CWE-1188"
              }
            ],
            "source": "security@bluespice.com",
            "type": "Secondary"
          }
        ]
      }
    }
  }
}



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